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Assessing the suitability of a one-time sampling event for close-kin mark-recapture: A caribou case study 评估近亲标记重捕一次性采样活动的适宜性:驯鹿案例研究。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-03 DOI: 10.1002/ece3.70230
Brandon D. Merriell, Micheline Manseau, Paul J. Wilson
{"title":"Assessing the suitability of a one-time sampling event for close-kin mark-recapture: A caribou case study","authors":"Brandon D. Merriell,&nbsp;Micheline Manseau,&nbsp;Paul J. Wilson","doi":"10.1002/ece3.70230","DOIUrl":"10.1002/ece3.70230","url":null,"abstract":"<p>Abundance estimation is frequently an objective of conservation and monitoring initiatives for threatened and other managed populations. While abundance estimation via capture–mark–recapture or spatially explicit capture–recapture is now common, such approaches are logistically challenging and expensive for species such as boreal caribou (<i>Rangifer tarandus</i>), which inhabit remote regions, are widely dispersed, and exist at low densities. Fortunately, the recently developed ‘close-kin mark–recapture’ (CKMR) framework, which uses the number of kin pairs obtained within a sample to generate an abundance estimate, eliminates the need for multiple sampling events. As a result, some caribou managers are interested in using this method to generate an abundance estimate from a single, non-invasive sampling event for caribou populations. We conducted a simulation study using realistic boreal caribou demographic rates and population sizes to assess how population size and the proportion of the population surveyed impact the accuracy and precision of single-survey CKMR-based abundance estimates. Our results indicated that abundance estimates were biased and highly imprecise when very small proportions of the population were sampled, regardless of the population size. However, the larger the population size, the smaller the required proportion of the population surveyed to generate both accurate and reasonably precise estimates. Additionally, we also present a case study in which we used the CKMR framework to generate annual female abundance estimates for a small caribou population in Jasper National Park, Alberta, Canada, from 2006 to 2015 and compared them to existing published capture–mark–recapture-based estimates. Both the accuracy and precision of the annual CKMR-based abundance estimates varied across years and were sensitive to the proportion of pairwise kinship comparisons which yielded a mother–offspring pair. Taken together, our study demonstrates that it is possible to generate CKMR-based abundance estimates from a single sampling event for small caribou populations, so long as a sufficient sampling intensity can be achieved.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371883/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142132147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evidence of longitudinal differences in spring migration strategies of an Arctic-nesting goose 北极筑巢雁春季迁徙策略纵向差异的证据。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-02 DOI: 10.1002/ece3.11665
Jay A. VonBank, Kevin J. Kraai, Daniel P. Collins, Paul T. Link, Mitch D. Weegman, Lei Cao, Bart M. Ballard
{"title":"Evidence of longitudinal differences in spring migration strategies of an Arctic-nesting goose","authors":"Jay A. VonBank,&nbsp;Kevin J. Kraai,&nbsp;Daniel P. Collins,&nbsp;Paul T. Link,&nbsp;Mitch D. Weegman,&nbsp;Lei Cao,&nbsp;Bart M. Ballard","doi":"10.1002/ece3.11665","DOIUrl":"10.1002/ece3.11665","url":null,"abstract":"<p>During spring, migratory birds are required to optimally balance energetic costs of migration across heterogeneous landscapes and weather conditions to survive and reproduce successfully. Therefore, an individual's migratory performance may influence reproductive outcomes. Given large-scale changes in land use, climate, and potential carry-over effects, understanding how individuals migrate in relation to breeding outcomes is critical to predicting how future scenarios may affect populations. We used GPS tracking devices on 56 Greater White-fronted Geese (<i>Anser albifrons</i>) during four spring migrations to examine whether migration characteristics influenced breeding propensity and breeding outcome. We found a strong longitudinal difference in arrival to the breeding areas (18 days earlier), pre-nesting duration (90.9% longer), and incubation initiation dates (9 days earlier) between western- and eastern-Arctic breeding regions, with contrasting effects on breeding outcomes, but no migration characteristic strongly influenced breeding outcome. We found that breeding region influenced whether an individual likely pursued a capital or income breeding strategy. Where individuals fell along the capital-income breeding continuum was influenced by longitude, revealing geographic effects of life-history strategy among conspecifics. Factors that govern breeding outcomes likely occur primarily upon arrival to breeding areas or are related to individual quality and previous breeding outcome, and may not be directly tied to migratory decision-making across broad scales.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11368494/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142119155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effectiveness of South Africa's network of protected areas: Unassessed vascular plants predicted to be threatened using deep neural networks are all located in protected areas 南非保护区网络的有效性:利用深度神经网络预测受到威胁的未评估维管植物全部位于保护区内。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-02 DOI: 10.1002/ece3.70229
Bahati Samuel Kandolo, Kowiyou Yessoufou, Mahlatse Kganyago
{"title":"Effectiveness of South Africa's network of protected areas: Unassessed vascular plants predicted to be threatened using deep neural networks are all located in protected areas","authors":"Bahati Samuel Kandolo,&nbsp;Kowiyou Yessoufou,&nbsp;Mahlatse Kganyago","doi":"10.1002/ece3.70229","DOIUrl":"10.1002/ece3.70229","url":null,"abstract":"<p>Globally, we are in the midst of a biodiversity crisis and megadiverse countries become key targets for conservation. South Africa, the only country in the world hosting three biodiversity hotspots within its borders, harbours a tremendous diversity of at-risk species deserving to be protected. However, the lengthy risk assessment process and the lack of required data to complete assessments is a serious limitation to conservation since several species may slide into extinction while awaiting risk assessment. Here, we employed a deep neural network model integrating species climatic and geographic features to predict the conservation status of 116 unassessed plant species. Our analysis involved in total of 1072 plant species and 96,938 occurrence points. The best-performing model exhibits high accuracy, reaching up to 83.6% at the binary classification and 56.8% at the detailed classification. Our best-performing model at the binary classification predicts that 32% (25 species) and 8% (3 species) of Data Deficient and Not-Evaluated species respectively, are likely threatened, amounting to a proportion of 24.1% of unassessed species facing a risk of extinction. Interestingly, all unassessed species predicted to be threatened are in protected areas, revealing the effectiveness of South Africa's network of protected areas in conservation, although these likely threatened species are more abundant outside protected areas. Considering the limitation in assessing only species with available data, there remains a possibility of a higher proportion of unassessed species being imperilled.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11368562/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142119154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cautionary tales on the use of proxies to estimate body size and form of extinct animals 关于使用替代物估算已灭绝动物体型和形态的警示故事。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-02 DOI: 10.1002/ece3.70218
Joel H. Gayford, Russell K. Engelman, Phillip C. Sternes, Wayne M. Itano, Mohamad Bazzi, Alberto Collareta, Rodolfo Salas-Gismondi, Kenshu Shimada
{"title":"Cautionary tales on the use of proxies to estimate body size and form of extinct animals","authors":"Joel H. Gayford,&nbsp;Russell K. Engelman,&nbsp;Phillip C. Sternes,&nbsp;Wayne M. Itano,&nbsp;Mohamad Bazzi,&nbsp;Alberto Collareta,&nbsp;Rodolfo Salas-Gismondi,&nbsp;Kenshu Shimada","doi":"10.1002/ece3.70218","DOIUrl":"10.1002/ece3.70218","url":null,"abstract":"<p>Body size is of fundamental importance to our understanding of extinct organisms. Physiology, ecology and life history are all strongly influenced by body size and shape, which ultimately determine how a species interacts with its environment. Reconstruction of body size and form in extinct animals provides insight into the dynamics underlying community composition and faunal turnover in past ecosystems and broad macroevolutionary trends. Many extinct animals are known only from incomplete remains, necessitating the use of anatomical proxies to reconstruct body size and form. Numerous limitations affecting the appropriateness of these proxies are often overlooked, leading to controversy and downstream inaccuracies in studies for which reconstructions represent key input data. In this perspective, we discuss four prominent case studies (<i>Dunkleosteus</i>, <i>Helicoprion</i>, Megalodon and <i>Perucetus</i>) in which proxy taxa have been used to estimate body size and shape from fragmentary remains. We synthesise the results of these and other studies to discuss nuances affecting the validity of taxon selection when reconstructing extinct organisms, as well as mitigation measures that can ensure the selection of the most appropriate proxy. We argue that these precautionary measures are necessary to maximise the robustness of reconstructions in extinct taxa for better evolutionary and ecological inferences.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11368419/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142119152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Potential drivers and implications of a balanced breeding sex ratio in a small population of an imperiled species with environmental sex determination 环境性别决定的濒危物种小种群繁殖性别比平衡的潜在驱动因素和影响。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-02 DOI: 10.1002/ece3.70166
Ian Silver-Gorges, Brian M. Shamblin, Mason Ashford, Paityn Bower, Mariana M. P. B. Fuentes
{"title":"Potential drivers and implications of a balanced breeding sex ratio in a small population of an imperiled species with environmental sex determination","authors":"Ian Silver-Gorges,&nbsp;Brian M. Shamblin,&nbsp;Mason Ashford,&nbsp;Paityn Bower,&nbsp;Mariana M. P. B. Fuentes","doi":"10.1002/ece3.70166","DOIUrl":"10.1002/ece3.70166","url":null,"abstract":"<p>Small populations of imperiled species are susceptible to the negative consequences of skewed sex-ratios. In imperiled species with environmental sex determination such as sea turtles, examining sex ratios across a range of environments and population abundance levels can provide insight into factors that influence population resilience, which can then be the foci of management plans for these species. Breeding sex ratios (the ratio of actively breeding males to females during a reproductive season; BSRs) extrapolated from genetic parentage analyses are a common approach for enumerating sex ratios in sea turtles. Such analyses also allow for the characterization of multiple paternity within sea turtle clutches, which should reflect BSRs and breeding behaviors. We characterized the first BSR for a breeding assemblage of loggerhead sea turtles (<i>Caretta caretta</i>) belonging to the temperate, low-abundance Northern Gulf of Mexico Recovery Unit using genotypes of 16 microsatellite loci from nesting females and hatchlings. Unlike prior studies at both more-tropical and more-temperate, and higher-abundance, Recovery Units in this region, we found a balanced BSR of 1.3:1 males:female and a low incidence (~17%) of multiple paternity. This suggests that there are relatively few males breeding at this assemblage and within this Recovery Unit. Beaches in this region are expected to produce substantial numbers of male hatchlings based on sand temperature data. The relative dearth of mature males may then be due to hydrologic disturbances that disproportionately affect the fitness and survival of male hatchlings, or due to demographic stochasticity. More work is needed to study the factors that might influence male hatchling production and fitness in this region, particularly as climate change is predicted to lead to feminization in global sea turtle populations. Our work demonstrates the broad utility of characterizing BSRs and other sex ratios across a range of populations in imperiled, environmentally sensitive species.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366973/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142119157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Subtle changes in plant diversity in the Bavarian Alps over the past eight decades 过去八十年巴伐利亚阿尔卑斯山植物多样性的微妙变化。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-02 DOI: 10.1002/ece3.70035
Meredith A. Zettlemoyer, Svenja Munck, Peter Poschlod, Sergey Rosbakh
{"title":"Subtle changes in plant diversity in the Bavarian Alps over the past eight decades","authors":"Meredith A. Zettlemoyer,&nbsp;Svenja Munck,&nbsp;Peter Poschlod,&nbsp;Sergey Rosbakh","doi":"10.1002/ece3.70035","DOIUrl":"10.1002/ece3.70035","url":null,"abstract":"<p>Historical resurveys represent a unique opportunity to analyze vegetation dynamics over longer timescales than is typically achievable. Leveraging the oldest historical dataset of vegetation change in the Bavarian Alps, Germany, we address how environmental conditions, vegetation composition, and functional diversity in the calcareous grasslands of the Schachen region have changed across different elevational ranges over an 83-year timeframe. We document changes in regional average temperature and precipitation. We use indicator values (IV) for species' ecological preferences and their palatability to grazers to infer local conditions (temperature, soil moisture/fertility, and grazing regime). We further estimate changes in temporal beta-diversity and functional trait community composition between historical (1936) and contemporary (2019) surveys in two elevational (subalpine and alpine) belts. Both subalpine and alpine sites became drier; subalpine sites also became warmer with more palatable plants. Species occurrence and abundance in the Schachen region has not changed substantially over time despite changing macroclimate and local environmental conditions under anthropogenic change. Yet these grasslands have experienced several “invisible” changes in functional composition over the past 80 years. As the Schachen has become drier, species with traits related to drought tolerance and animal-based dispersal have increased in dominance. Specifically, in alpine sites, community-weighted means revealed that with low fecundity, higher potential for endo- and epizoochory (seed dispersal via animal gut and fur, respectively), higher foliar frost tolerance, and deeper dormancy increased in dominance. Similar trends were found for increasing dominance of low fecundity, epizoochorous species in subalpine sites. Vegetation data from resurveying historical plots in combination with changes in local conditions, classic biodiversity indices, and functional trait indices can provide more holistic insights into changes in the environment and potential impacts of those environmental changes on long-term plant community and functional diversity.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366975/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142119159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microbial DNA extraction method for avian feces and preen oil from diverse species 不同物种禽类粪便和粪便油的微生物 DNA 提取方法。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-02 DOI: 10.1002/ece3.70220
Austin C. Russell, Margaret A. Kenna, Alex Van Huynh, Amber M. Rice
{"title":"Microbial DNA extraction method for avian feces and preen oil from diverse species","authors":"Austin C. Russell,&nbsp;Margaret A. Kenna,&nbsp;Alex Van Huynh,&nbsp;Amber M. Rice","doi":"10.1002/ece3.70220","DOIUrl":"10.1002/ece3.70220","url":null,"abstract":"<p>As DNA sequencing technology continues to rapidly improve, studies investigating the microbial communities of host organisms (i.e., microbiota) are becoming not only more popular but also more financially accessible. Across many taxa, microbiomes can have important impacts on organismal health and fitness. To evaluate the microbial community composition of a particular microbiome, microbial DNA must be successfully extracted. Fecal samples are often easy to collect and are a good source of gut microbial DNA. Additionally, interest in the avian preen gland microbiome is rapidly growing, due to the importance of preen oil for many aspects of avian life. Microbial DNA extractions from avian fecal and preen oil samples present multiple challenges, however. Here, we describe a modified PrepMan Ultra Sample Preparation Reagent microbial DNA extraction method that is less expensive than other commonly used methodologies and is highly effective for both fecal and preen oil samples collected from a broad range of avian species. We expect our method will facilitate microbial DNA extractions from multiple avian microbiome reservoirs, which have previously proved difficult and expensive. Our method therefore increases the feasibility of future studies of avian host microbiomes.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11368492/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142121577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rampant intraspecific variation of plastid genomes in Gentiana section Chondrophyllae 龙胆科植物质体基因组的种内变异猖獗。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-02 DOI: 10.1002/ece3.70239
Shan-Shan Sun, Zhi-Yong Pan, Yu Fu, Shen-Jue Wang, Peng-Cheng Fu
{"title":"Rampant intraspecific variation of plastid genomes in Gentiana section Chondrophyllae","authors":"Shan-Shan Sun,&nbsp;Zhi-Yong Pan,&nbsp;Yu Fu,&nbsp;Shen-Jue Wang,&nbsp;Peng-Cheng Fu","doi":"10.1002/ece3.70239","DOIUrl":"10.1002/ece3.70239","url":null,"abstract":"<p>Exploring the level of intraspecific diversity in taxa experienced radiation is helpful to understanding speciation and biodiversity assembly. <i>Gentiana</i> section <i>Chondrophyllae</i> sensu lato encompasses more than 180 species and occupies more a half of species in the genus. In this study, we collected samples across the range of three species (<i>Gentiana aristata</i>, <i>G. crassuloides</i> and <i>G. haynaldii</i>) in section <i>Chondrophyllae</i> s.l., and recovered the intra-species variation by comparing with closely related taxon. Using 25 newly sequenced plastid genomes together with previously published data, we compared structural differences, quantified the variations in plastome size, and measured nucleotide diversity in various regions. Our results showed that the plastome size variation in the three <i>Chondrophyllae</i> species ranged from 285 to 628 bp, and the size variation in LSC, IR and SSC ranged from 236 to 898 bp, 52 to 393 bp and 135 to 356 bp, respectively. Nucleotide diversity of plastome or any of the four regions was much higher than the control species. The average nucleotide diversity in plastomes of the three species ranged from 0.0010 to 0.0023 in protein coding genes, and from 0.0023 to 0.0061 in intergenic regions. More repeat sequence variations were detected within the three <i>Chondrophyllae</i> species than the control species. Various plastid sequence matrixes resulted in different backbone topology in two target species, showed uncertainty in phylogenetic relationship based inference. In conclusion, our results recovered that species of <i>G.</i> section <i>Chondrophyllae</i> s.l. has high intraspecific plastome variation, and provided insights into the radiation in this speciose lineage.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11368500/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142119158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Between-year weather differences and long-term environmental trends both contribute to observed vegetation changes in a plot resurvey study 在一项地块重新调查研究中,年际天气差异和长期环境趋势都会导致观测到的植被变化。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-02 DOI: 10.1002/ece3.70244
László Erdős, Gábor Ónodi, Khanh Vu Ho, Eszter Tanács, Rabuogi Quinter Akinyi, Péter Török, Csaba Tölgyesi, Zoltán Bátori, György Kröel-Dulay
{"title":"Between-year weather differences and long-term environmental trends both contribute to observed vegetation changes in a plot resurvey study","authors":"László Erdős,&nbsp;Gábor Ónodi,&nbsp;Khanh Vu Ho,&nbsp;Eszter Tanács,&nbsp;Rabuogi Quinter Akinyi,&nbsp;Péter Török,&nbsp;Csaba Tölgyesi,&nbsp;Zoltán Bátori,&nbsp;György Kröel-Dulay","doi":"10.1002/ece3.70244","DOIUrl":"10.1002/ece3.70244","url":null,"abstract":"<p>Repeated surveys of vegetation plots offer a viable tool to detect fine-scale responses of vegetation to environmental changes. In this study, our aim was to explore how the species composition and species richness of dry grasslands changed over a period of 17 years, how these changes relate to environmental changes and how the presence of spring ephemerals, which may react to short-term weather fluctuations rather than long-term climatic trends, may influence the results. A total of 95 plots was surveyed in 2005 and resurveyed in 2022 in dry grasslands of the Kiskunság Sand Ridge (Hungary, Eastern Central Europe), where there has been a significant increase in mean annual temperature during the last decades, while no trends in precipitation can be identified. Db-RDA was performed to reveal compositional changes. The changes in environmental conditions and naturalness state were assessed using ecological and naturalness indicator values. We also compared per-plot richness of all species, native species and non-native species of the old and the new relevés. All analyses were repeated after removing all spring ephemerals. We found clear temporal changes in species composition. Mean temperature indicator values increased, while mean soil moisture indicator values decreased during the 17 years. Also, decreasing per-plot richness was detected both for all species and for native species, while mean naturalness increased. After the removal of spring ephemerals, the compositional changes were less obvious although still significant. The increase in the temperature indicator values remained significant even without the spring ephemerals. However, the decrease in the moisture indicator values, the decrease in the number of all species and native species, as well as the increase in naturalness indicator values disappeared when spring ephemerals were excluded from the analyses. Our study demonstrates that between-year weather differences and long-term environmental trends both contribute to observed vegetation changes.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11368499/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142119251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nutritional condition drives spatial variation in physiology of Antarctic lipid-storing copepods 营养状况导致南极贮脂桡足类生理学的空间差异。
IF 2.3 2区 生物学
Ecology and Evolution Pub Date : 2024-09-02 DOI: 10.1002/ece3.70210
Cory A. Berger, Deborah K. Steinberg, Ann M. Tarrant
{"title":"Nutritional condition drives spatial variation in physiology of Antarctic lipid-storing copepods","authors":"Cory A. Berger,&nbsp;Deborah K. Steinberg,&nbsp;Ann M. Tarrant","doi":"10.1002/ece3.70210","DOIUrl":"10.1002/ece3.70210","url":null,"abstract":"<p>Lipid-rich copepods form an essential link between primary producers and higher trophic levels in high-latitude oceans. These zooplankton can take advantage of ephemeral phytoplankton blooms to fuel development and reproduction. However, we have limited understanding of how the physiological condition of these animals varies in relation to environmental factors such as food availability. Due to high advection, it is likely that physiological plasticity, rather than local adaptation, is primarily responsible for physiological differences within a region. We use transcriptomics and other physiological metrics to understand how two species of copepods (<i>Calanoides acutus</i> and <i>Calanus propinquus</i>) vary across environmental gradients along the West Antarctic Peninsula. For the primarily herbivorous <i>C. acutus</i>, physiological separation between sampling locations appears to be driven by feeding status, and gene expression differences indicate differential expression of genes regulating lipid metabolism, reproduction, aerobic metabolism, and protein translation. For the more omnivorous <i>C. propinquus</i>, physiology and gene expression did not segregate as clearly by location, showed minimal signs of food deprivation at any location, and had a weaker relationship with chlorophyll compared to <i>C. acutus</i>. By comparing these results with concurrent starvation experiments, we find that spatial variation in gene expression reflects short-term differences in food availability (particularly for <i>C. acutus</i>), and we identify genes whose expression indicates recent feeding status. Further examination of the relationships between food availability, copepod physiology, and population dynamics will ultimately improve our capacity to predict how copepod populations will respond to rapidly changing environmental conditions in the West Antarctic Peninsula ecosystem.</p>","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369209/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142125150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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