Oecologia最新文献_第9页

Coexistence of territorial competitor ants in fragmented boreal forest landscape. 北方森林破碎景观中领地竞争蚂蚁的共存。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2024-10-01 Epub Date: 2024-09-28 DOI: 10.1007/s00442-024-05626-8

Jouni Sorvari, Esa Huhta, Harri Hakkarainen

{"title":"Coexistence of territorial competitor ants in fragmented boreal forest landscape.","authors":"Jouni Sorvari, Esa Huhta, Harri Hakkarainen","doi":"10.1007/s00442-024-05626-8","DOIUrl":"10.1007/s00442-024-05626-8","url":null,"abstract":"The distribution of species in a patchy habitat may be influenced by competitive interactions. The dominant and highly competitive boreal ant species belong to the Formica rufa group. A pair of species, Formica aquilonia and Formica polyctena, require extensive territories due to their multi-nest breeding habits. The coexistence and habitat patterns of these two wood ant species in the boreal forest landscape were investigated. Forest characteristics in the vicinity of nests in forest patches were similar for both species, but they did not coexist in the same sampling plots of 0.79 ha in forest patches, indicating competitive exclusion. The sampling plots in large forest patches were more occupied by F. aquilonia, while no such association was found for F. polyctena. At a larger spatial scale (78.5 ha), we found that F. polyctena was more tolerant of smaller forest patches than F. aquilonia suggesting that these two ant species can coexist in moderately fragmented forest landscapes. However, forest habitat loss, fragmentation and climate-induced changes in forest tree structure may shift the species balance in favour of F. polyctena over F. aquilonia in the future.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":" ","pages":"187-197"},"PeriodicalIF":2.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11489285/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142351155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

River-estuary continuum highlighted by variabilities in carbon and nitrogen stable isotope ratios of the catadromous eel Anguilla japonica. 溯河鳗鲡碳和氮稳定同位素比值的变化凸显了河流-河口的连续性。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2024-10-01 Epub Date: 2024-09-19 DOI: 10.1007/s00442-024-05618-8

Atsushi Nishimoto, Masuo Iida, Kazuki Yokouchi, Nobuto Fukuda, Toshihiro Yamamoto

{"title":"River-estuary continuum highlighted by variabilities in carbon and nitrogen stable isotope ratios of the catadromous eel Anguilla japonica.","authors":"Atsushi Nishimoto, Masuo Iida, Kazuki Yokouchi, Nobuto Fukuda, Toshihiro Yamamoto","doi":"10.1007/s00442-024-05618-8","DOIUrl":"10.1007/s00442-024-05618-8","url":null,"abstract":"Estuaries exhibit high physicochemical variability and the properties of estuaries and the constituent segments are not yet systematically understood. This study aims to reveal the spatial heterogeneity of predominant organic sources using carbon and nitrogen stable isotope ratios (δ13C and δ15N, respectively) of Japanese eels (Anguilla japonica), one of the ideal natural samplers. In the Miyakoda River, Japan, our study site, the effectiveness of eel δ13C and δ15N values as standard indices of predominant organic sources was tested by employing the River Continuum Concept. This study then extended the application of these indices to the estuary, i.e., the Hamana Lake system, into which the Miyakoda River flows. Once in the upper estuary, eel δ13C and δ15N values became high, with the latter peaking in this river-estuary continuum, indicating that artificial labile subsidies (nutrients and organic matter) with high δ15N values were rapidly assimilated into the food web. Eel δ15N values decreased again in the middle estuary. Nevertheless, the influence of terrestrial organic subsidies extended into this segment, as evidenced by the low δ13C values of eels. These results suggest that refractory organic matter with low δ15N values, such as plant-derived ones, is slowly assimilated into the food web in the downstream estuarine segments. The higher δ13C values in the lower estuary suggested that the contribution of eelgrass or macroalgae occurred in addition to benthic microalgae. Thus, our results emphasize the need to consider the multiple energy flows to understand the estuary as a continuum.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":" ","pages":"151-162"},"PeriodicalIF":2.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142292310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nutrient responses of vascular plants to N₂-fixing tree Alnus hirsuta encroachment in a boreal peatland. 北方泥炭地中维管束植物对固氮树 Alnus hirsuta 侵蚀的养分反应。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2024-10-01 Epub Date: 2024-08-12 DOI: 10.1007/s00442-024-05605-z

Xinhou Zhang, Wen Xiao, Changchun Song, Jinbo Zhang, Xueyan Liu, Rong Mao

{"title":"Nutrient responses of vascular plants to N2-fixing tree Alnus hirsuta encroachment in a boreal peatland.","authors":"Xinhou Zhang, Wen Xiao, Changchun Song, Jinbo Zhang, Xueyan Liu, Rong Mao","doi":"10.1007/s00442-024-05605-z","DOIUrl":"10.1007/s00442-024-05605-z","url":null,"abstract":"The N2-fixing trees Alnus spp. have been widely encroaching into boreal peatlands, but the nutrient responses of native vascular plants remain unclear. Here, we compared nutrient concentrations and isotope signal of six common plants (Betula fruticosa, Salix rosmarinifolia, Vaccinium uliginosum, Rhododendron tomentosum, Chamaedaphne calyculata, and Eriophorum vaginatum) between Alnus hirsuta island and open peatland and assessed plant nutrient responses to A. hirsuta encroachment in boreal peatlands. Alnus hirsuta encroachment increased nitrogen (N) concentration of leaf, branch, and stem. Despite no significant interspecific difference in branch and stem, the increment magnitude of leaf N concentration varied among species, with greatest magnitude for R. tomentosum (55.1% ± 40.7%) and lowest for E. vaginatum (9.80% ± 4.40%) and B. fruticosa (18.4% ± 10.7%). Except for E. vaginatum, the significant increase in δ15N occurred for all organs of shrubs, with interspecific differences in change of leaf δ15N. According to the mass balance equation involving leaf δ15N, R. tomentosum and E. vaginatum, respectively, obtained highest (40.5% ± 19.8%) and lowest proportions (-14.0% ± 30.5%) of N from A. hirsuta. Moreover, the increment magnitudes of leaf N concentration showed a positive linear relationship with the proportion of N from A. hirsuta. In addition, A. hirsuta encroachment reduced leaf phosphorus (P) concentration of deciduous shrubs (i.e., B. fruticosa, S. rosmarinifolia, and V. uliginosum), thus increasing N:P ratio. These findings indicate that Alnus encroachment improves native plant N status and selectively intensifies P limitation of native deciduous shrubs, and highlight that the N acquisition from the symbiotic N2-fixing system regulates plant N responses in boreal peatlands.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":" ","pages":"1-10"},"PeriodicalIF":2.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141917222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Colonization of mudflat substrate by microarthropods: the role of distance, inundation frequency and body size. 微型节肢动物在泥滩基质上的定殖：距离、淹没频率和体型的作用。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2024-10-01 Epub Date: 2024-09-04 DOI: 10.1007/s00442-024-05615-x

Md Ekramul Haque, Maria Rinke, Ting-Wen Chen, Mark Maraun, Stefan Scheu

{"title":"Colonization of mudflat substrate by microarthropods: the role of distance, inundation frequency and body size.","authors":"Md Ekramul Haque, Maria Rinke, Ting-Wen Chen, Mark Maraun, Stefan Scheu","doi":"10.1007/s00442-024-05615-x","DOIUrl":"10.1007/s00442-024-05615-x","url":null,"abstract":"Salt marshes represent a unique ecosystem at the marine-terrestrial boundary of shallow protected coastlines. Microarthropods form an essential component of soil food webs, but how they colonize new intertidal habitats is little understood. By establishing two experimental systems without animals, we investigated microarthropod colonization (1) at the seashore from the pioneer zone to the lower and upper salt marsh and (2) at the same tidal height on artificial islands 500 m from the seashore. Potential source populations of microarthropods in the respective zones were also investigated. Colonization of microarthropods after 5 years was consistently faster on the seashore than on the artificial islands. Collembola and Mesostigmata colonized all the zones both on the seashore and on the artificial islands, with colonization being faster in the upper salt marsh and in the pioneer zone than in the lower salt marsh. Oribatida colonized the new habitats on the seashore, but only little on the artificial islands. Variations in species composition were more pronounced between salt marsh zones than between experimental systems, indicating that local environmental conditions (i.e., inundation frequency) are more important for the assembly of microarthropod communities than the distance from source populations (i.e., dispersal processes). Variations in community body size of Oribatida and Mesostigmata indicated environmental filtering of traits, with smaller species suffering from frequent inundations. Notably, Mesostigmata most successfully colonized the new habitats across salt marsh zones on both systems. Overall, the results document major mechanisms of colonization of intertidal habitats by microarthropods with different life histories and feeding strategies.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":" ","pages":"87-100"},"PeriodicalIF":2.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11489214/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142133315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of vertebrate scavengers on leakage of nutrients from carcasses. 脊椎动物食腐动物对尸体营养物质泄漏的影响。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2024-10-01 Epub Date: 2024-08-17 DOI: 10.1007/s00442-024-05608-w

Elke Wenting, Patrick A Jansen, Simon Burggraeve, Devon F Delsman, Henk Siepel, Frank van Langevelde

{"title":"The influence of vertebrate scavengers on leakage of nutrients from carcasses.","authors":"Elke Wenting, Patrick A Jansen, Simon Burggraeve, Devon F Delsman, Henk Siepel, Frank van Langevelde","doi":"10.1007/s00442-024-05608-w","DOIUrl":"10.1007/s00442-024-05608-w","url":null,"abstract":"The decomposition of carcasses by scavengers and microbial decomposers is an important component of the biochemical cycle that can strongly alter the chemical composition of soils locally. Different scavenger guilds are assumed to have a different influence on the chemical elements that leak into the soil, although this assumption has not been empirically tested. Here, we experimentally determine how different guilds of vertebrate scavengers influence local nutrient dynamics. We performed a field experiment in which we systematically excluded different subsets of vertebrate scavengers from decomposing carcasses of fallow deer (Dama dama), and compared elemental concentrations in the soil beneath and in the vegetation next to the carcasses over time throughout the decomposition process. We used four exclusion treatments: excluding (1) no scavengers, thus allowing them all; (2) wild boar (Sus scrofa); (3) all mammals; and (4) all mammals and birds. We found that fluxes of several elements into the soil showed distinct peaks when all vertebrates were excluded. Especially, trace elements (Cu and Zn) seemed to be influenced by carcass decomposition. However, we found no differences in fluxes between partial exclusion treatments. Thus, vertebrate scavengers indeed reduce leakage of elements from carcasses into the soil, hence influencing local biochemical cycles, but did so independent of which vertebrate scavenger guild had access. Our results suggest that carcass-derived elements are dispersed over larger areas rather than locally leak into the soil when vertebrate scavengers dominate the decomposition process.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":" ","pages":"21-35"},"PeriodicalIF":2.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11489260/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141996236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Warming suppresses grassland recovery in biomass but not in community composition after grazing exclusion in a Mongolian grassland 变暖抑制了蒙古草原禁牧后生物量的恢复，但没有抑制群落组成的恢复

IF 2.7 2区环境科学与生态学

Oecologia Pub Date : 2024-09-18 DOI: 10.1007/s00442-024-05620-0

Toshihiko Kinugasa, Yu Yoshihara, Ryoga Aoki, Batdelger Gantsetseg, Takehiro Sasaki

{"title":"Warming suppresses grassland recovery in biomass but not in community composition after grazing exclusion in a Mongolian grassland","authors":"Toshihiko Kinugasa, Yu Yoshihara, Ryoga Aoki, Batdelger Gantsetseg, Takehiro Sasaki","doi":"10.1007/s00442-024-05620-0","DOIUrl":"https://doi.org/10.1007/s00442-024-05620-0","url":null,"abstract":"We conducted a 4-year temperature manipulation experiment in a Mongolian grassland to examine the effect of daytime and nighttime warming on grassland recovery after grazing exclusion. After constructing a livestock exclusion fence in the grassland, we established daytime and daytime-and-nighttime warming treatments within the fenced area by a combination of open-top chambers (OTC) and electric heaters. We measured the numbers of plants and aboveground biomass by species after recording percentage vegetation cover every summer for three warming treatments inside the fence—non-warming, daytime warming, and daytime-and-nighttime warming—and for the grassland outside of the fence. OTCs increased daytime temperature by about 2.0 °C, and heaters increased nighttime temperature by 0.9 °C during the growing period. Grazing exclusion had little effect on grassland biomass but reduced the abundance of poorly palatable species and modified plant community composition. Daytime warming decreased soil moisture and lowered aboveground biomass within the fenced grassland but had little effect on plant community composition. Nighttime warming lowered soil moisture further but its effects on grassland biomass and community composition were undetectable. We concluded that recovery of plant biomass in grasslands degraded by grazing would be lowered by future climate warming through soil drying. Because warming had little effect on the recovery of community composition, adverse effects of warming on grassland recovery might be offset by improving plant productivity through mitigation of soil drying by watering. Soil drying due to nighttime warming might have detectable effects on vegetation when warming persists for a long time.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"75 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Post-fire temporal dynamics of plant-pollinator communities in a tropical savanna 热带稀树草原植物授粉者群落火灾后的时间动态

IF 2.7 2区环境科学与生态学

Oecologia Pub Date : 2024-09-13 DOI: 10.1007/s00442-024-05619-7

Alberto L. Teixido, Camila S. Souza, Gudryan J. Barônio, Maria R. Sigrist, Josué Raizer, Camila Aoki

{"title":"Post-fire temporal dynamics of plant-pollinator communities in a tropical savanna","authors":"Alberto L. Teixido, Camila S. Souza, Gudryan J. Barônio, Maria R. Sigrist, Josué Raizer, Camila Aoki","doi":"10.1007/s00442-024-05619-7","DOIUrl":"https://doi.org/10.1007/s00442-024-05619-7","url":null,"abstract":"Fire is a major ecological and evolutionary factor promoting biodiversity and maintaining functioning of naturally fire-prone ecosystems. In tropical savannas, plant communities show a set of fire-adapted traits and both flowering and pollination services have the potential to rapidly regenerate after fire, but fire-suppression policies may disrupt this adaptability following potential woody encroachment. Understanding the effects of fire on plant–pollinator interactions are required to advance conservation of biodiversity and ecosystem functioning. We evaluated the dynamics of plant community assemblage, flower availability, composition of flower functional traits associated with attractiveness to pollinators, and activity and diversity of insect pollinator guilds over ten post-fire stand ages along a 14-year chronosequence in a naturally burned region in the Cerrado, a megadiverse savanna in Brazil. We expect to find a high resilience of plant-pollinator communities and a steady decline in the successional recovery as time-since-fire proceeds. Along the post-fire chronosequence, vegetation was dominated by subshrubs with tubular, white, and nectar flowers arranged in inflorescences, while bees were the predominant pollinators. Plant assemblage and flower number showed an initial significant increase but monotonically declined after 7–9 years after fire. Accordingly, pollinator richness and abundance significantly reached highest peaks in interim periods and a steady decline over time. In contrast, the frequency of community-wide plant-life form, flower functional traits, and pollinator diversity remained unaltered over the post-fire chronosequence. We added compelling evidence of a high post-fire resilience of plant-pollinator communities and further understanding of how fire-suppression policies may affect pollination in the Cerrado.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"33 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms determining the multi-diversity of carrion visiting species along a gradient of carrion body mass 决定沿腐肉质量梯度访问腐肉的物种多样性的机制

IF 2.7 2区环境科学与生态学

Oecologia Pub Date : 2024-09-09 DOI: 10.1007/s00442-024-05611-1

Amelie Wierer, Christian von Hoermann, M. Eric Benbow, Christiane Büchner, Heike Feldhaar, Christian Fiderer, Oliver Mitesser, Janine Rietz, Jens Schlüter, Johannes Zeitzler, Tomáš Lackner, Claus Bässler, Marco Heurich, Jörg Müller

{"title":"Mechanisms determining the multi-diversity of carrion visiting species along a gradient of carrion body mass","authors":"Amelie Wierer, Christian von Hoermann, M. Eric Benbow, Christiane Büchner, Heike Feldhaar, Christian Fiderer, Oliver Mitesser, Janine Rietz, Jens Schlüter, Johannes Zeitzler, Tomáš Lackner, Claus Bässler, Marco Heurich, Jörg Müller","doi":"10.1007/s00442-024-05611-1","DOIUrl":"https://doi.org/10.1007/s00442-024-05611-1","url":null,"abstract":"Resource availability and habitat heterogeneity are essential drivers of biodiversity, but their individual roles often remain unclear since both factors are often correlated. Here, we tested the more-individuals hypothesis (MIH) and the habitat-heterogeneity hypothesis (HHH) for bacteria, fungi, dipterans, coleopterans, birds, and mammals on 100 experimentally exposed carcasses ranging by three orders of magnitude in body mass. At the level of each carcass we found marginal or significant support for the MIH for bacteria, fungi, and beetles in spring and significant support for fungi, dipterans, and mammals in summer. The HHH was supported only for bacteria in spring, while it was supported for all groups except mammals in summer. Overall multidiversity always increased with body mass, with a steeper increase in summer. Abundance based rarefaction-extrapolation curves for three classes of body mass showed the highest species richness for medium-sized carcasses, particular for dipterans and microbes, supporting the HHH also among carcasses. These findings complement existing necromass studies of deadwood, showing there are more niches associated with larger resource amounts and an increasing habitat heterogeneity between carcasses most pronounced for medium-sized species. Higher resource amount led to increased diversity of carrion-consuming organisms in summer, particularly due to the increasing number of niches with increasing size. Our findings underline the importance of distributed large carrion as well as medium-sized carrion in ecosystems supporting overall biodiversity of carrion-consumers. Furthermore, the different responses in spring and summer may inform strategies of carrion enrichment management schemes throughout the year.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"56 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-scale beta-diversity patterns in testate amoeba communities: species turnover and nestedness along a latitudinal gradient. 睾丸变形虫群落的多尺度贝塔多样性模式：沿纬度梯度的物种更替和嵌套。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2024-08-01 Epub Date: 2024-08-08 DOI: 10.1007/s00442-024-05602-2

Jiahui Su, Yuri A Mazei, Andrey N Tsyganov, Viktor A Chernyshov, Natalia G Mazei, Damir A Saldaev, Basil N Yakimov

{"title":"Multi-scale beta-diversity patterns in testate amoeba communities: species turnover and nestedness along a latitudinal gradient.","authors":"Jiahui Su, Yuri A Mazei, Andrey N Tsyganov, Viktor A Chernyshov, Natalia G Mazei, Damir A Saldaev, Basil N Yakimov","doi":"10.1007/s00442-024-05602-2","DOIUrl":"10.1007/s00442-024-05602-2","url":null,"abstract":"The relationship between species diversity and spatial scale is a central topic in spatial community ecology. Latitudinal gradient is among the core mechanisms driving biodiversity distribution on most scales. Patterns of β-diversity along latitudinal gradient have been well studied for aboveground terrestrial and marine communities, whereas soil organisms remain poorly investigated in this regard. The West Siberian Plain is a good model to address diversity scale-dependence since the latitudinal gradient does not overlap with other possible factors such as elevational or maritime. Here, we collected 111 samples following hierarchical sampling (sub-zones, ecosystem types, microhabitat and replicate samples) and performed multi-scale partitioning of β-diversity of testate amoeba assemblages as a model of study. We found that among-ecosystem β-diversity is a leading scale in testate amoeba assemblages variation. Rare species determine β-diversity at all scale levels especially in the northern regions, where rare taxa almost exclusively accounted for the diversity at the ecosystem level. β-Diversity is generally dominated by the turnover component at all scales in lower latitudes, whereas nestedness prevailed at among-ecosystem scale in higher latitudes. These findings indicate that microbial assemblages in northern latitudes are spatially homogeneous and constrained by historical drivers at larger scales, whereas in southern regions, it is dominated by the turnover component both at the microhabitat and ecosystem scales and therefore determined by recent vegetation and environmental heterogeneity. Overall, we have provided the evidence for the existence of negative latitudinal gradient for among-ecosystem β-diversity but not for among-microhabitat and among-sample β-diversity for terrestrial testate amoeba communities.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":" ","pages":"691-707"},"PeriodicalIF":2.3,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141902516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coral reef fish density at a tourist destination responded rapidly to COVID-19 restrictions. 一个旅游景点的珊瑚礁鱼类密度对 COVID-19 限制迅速做出反应。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2024-08-01 Epub Date: 2024-07-14 DOI: 10.1007/s00442-024-05589-w

Emma Gairin, Frédéric Bertucci, Natacha Roux, Lana Minier, Cécile Berthe, Viliame Waqalevu, Tehani Maueau, Vincent Sturny, Gaston Tong Sang, Suzanne C Mills, David Lecchini

{"title":"Coral reef fish density at a tourist destination responded rapidly to COVID-19 restrictions.","authors":"Emma Gairin, Frédéric Bertucci, Natacha Roux, Lana Minier, Cécile Berthe, Viliame Waqalevu, Tehani Maueau, Vincent Sturny, Gaston Tong Sang, Suzanne C Mills, David Lecchini","doi":"10.1007/s00442-024-05589-w","DOIUrl":"10.1007/s00442-024-05589-w","url":null,"abstract":"Throughout the world, anthropogenic pressure on natural ecosystems is intensifying, notably through urbanisation, economic development, and tourism. Coral reefs have become exposed to stressors related to tourism. To reveal the impact of human activities on fish communities, we used COVID-19-related social restrictions in 2021. In French Polynesia, from February to December 2021, there was a series of restrictions on local activities and international tourism. We assessed the response of fish populations in terms of changes in the species richness and density of fish in the lagoon of Bora-Bora (French Polynesia). We selected sites with varying human pressures-some dedicated to tourism activities, others affected by boat traffic, and control sites with little human presence. Underwater visual surveys demonstrated that fish density and richness differed spatially and temporally. They were lowest on sites affected by boat traffic regardless of pandemic-related restrictions, and when activities were authorised; they were highest during lockdowns. Adult fish density increased threefold on sites usually affected by boat traffic during lockdowns and increased 2.7-fold on eco-tourism sites during international travel bans. Human activities are major drivers of fish density and species richness spatially across the lagoon of Bora-Bora but also temporally across pandemic-related restrictions, with dynamic responses to different restrictions. These results highlight the opportunity provided by pauses in human activities to assess their impact on the environment and confirm the need for sustainable lagoon management in Bora-Bora and similar coral reef settings affected by tourism and boat traffic.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":" ","pages":"533-543"},"PeriodicalIF":2.3,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141616902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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