Oecologia最新文献_第2页

Contrasting water, dry matter and air contents distinguish orthophylls, sclerophylls and succophylls (leaf succulents). 通过对比水分、干物质和空气含量来区分正叶物质、硬叶物质和叶肉物质。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-20 DOI: 10.1007/s00442-025-05686-4

Byron B Lamont, Heather C Lamont

{"title":"Contrasting water, dry matter and air contents distinguish orthophylls, sclerophylls and succophylls (leaf succulents).","authors":"Byron B Lamont, Heather C Lamont","doi":"10.1007/s00442-025-05686-4","DOIUrl":"10.1007/s00442-025-05686-4","url":null,"abstract":"Differences in leaf texture (hardness, thickness) distinguish orthophylls (soft leaves), sclerophylls (hard leaves) and (semi)succophylls (water-storing leaves). Texture is controlled by dry matter, water and air contents. Our aim was to a) identify the best index of succulence, b) assess how these three components vary with leaf type, and c) derive bounds for these properties among the four main leaf-texture classes. Eight contrasting species from the Namib Desert, South Africa were assessed for their leaf area (A), thickness (z), dry mass (D), saturated water content (Q), and relative volume of dry matter, water and air to derive various indices of leaf texture. Q/A (= QV•z), where QV is saturated water storage per unit volume of leaf and z is leaf thickness is an ideal index of succulence. Specific leaf area (SLA) is more suitable as an index of hardness (SLA-1 = D/A) but only among non-succulents. Rising leaf specific gravity among sclero-orthophylls is due to replacement of air by dry matter but water among succophylls. Collation of 13 worldwide studies showed that orthophylls can be distinguished by a Q/A ≤ 0.45 mg water mm-2 leaf surface from succophylls with Q/A ≥ 0.9, such that there is a divergent relationship among plants regarding their water-storing properties. Semi-succophylls can be defined as having a Q/A > 0.45 to < 0.9, and sclerophylls can be separated from orthophylls by a SLA ≤ 10 mm2 mg-1 dry mass. The distribution of these leaf texture classes may vary greatly within, and especially between, local floras.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 4","pages":"54"},"PeriodicalIF":2.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11926024/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143670512","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

Patterns of seasonal plasticity in evaporative water loss and preferred temperature in three geckos of the wet-dry tropics. 干湿热带地区三种壁虎蒸发失水和偏好温度的季节可塑性模式。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-14 DOI: 10.1007/s00442-025-05692-6

Kimberley Day, Chava L Weitzman, Angga Rachmansah, Kade Skelton, Keith Christian

{"title":"Patterns of seasonal plasticity in evaporative water loss and preferred temperature in three geckos of the wet-dry tropics.","authors":"Kimberley Day, Chava L Weitzman, Angga Rachmansah, Kade Skelton, Keith Christian","doi":"10.1007/s00442-025-05692-6","DOIUrl":"10.1007/s00442-025-05692-6","url":null,"abstract":"Seasonal physiological plasticity (acclimatisation) facilitates homeostasis in changing environments and has been studied extensively with respect to thermal biology and metabolism. Less is known about seasonal changes in evaporative water loss (EWL) in response to changing water availability and humidity. The wet-dry tropics of northern Australia experience moderate seasonal temperature changes, but substantial changes in rainfall and humidity. We studied three gecko species (Amalosia rhombifer, Heteronotia binoei and Hemidactylus frenatus) in the wet and dry seasons with respect to their EWL, preferred body temperatures (Tpref), and their choice between a dry and humid refuge at and below Tpref. EWL was significantly lower in the dry season (66% of wet season values). Tpref for two of the species did not change seasonally, but A. rhombifer selected lower Tpref during the warmer wet season. Given a choice of refugia, the humid refuge at low temperatures was never preferred over the warm microhabitat. When both refugia were at the preferred temperature, only A. rhombifer showed a preference for the humid microhabitat. These results demonstrate that although thermoregulation is prioritised in the short term, hydroregulation (physiological plasticity in EWL) is adjusted in the longer term, with shifts occurring on a seasonal scale. However, it is possible that shifts in EWL may occur in response to prevailing weather conditions on a shorter timescale. Before broad generalisations can be drawn about the phenomenon of EWL plasticity, measurements need to be taken from more species in different climatic regions at ecologically relevant timescales.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 3","pages":"53"},"PeriodicalIF":2.3,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11909027/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143630638","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

Natural history traits influence winners and losers for herpetological communities in disturbed tropical habitats. 自然历史特征影响着热带受干扰生境中爬行动物群落的胜败。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-12 DOI: 10.1007/s00442-025-05691-7

Rowland K Griffin, Todd R Lewis, Joseph Tzanopoulos, Richard A Griffiths

{"title":"Natural history traits influence winners and losers for herpetological communities in disturbed tropical habitats.","authors":"Rowland K Griffin, Todd R Lewis, Joseph Tzanopoulos, Richard A Griffiths","doi":"10.1007/s00442-025-05691-7","DOIUrl":"10.1007/s00442-025-05691-7","url":null,"abstract":"Habitat alteration can lead to a few 'winning' species outcompeting many 'losing' species, an effect commonly termed as 'Winner-Loser-Replacements' or WLRs. This can lead to homogenisation of species assemblages at phylogenetic and functional levels. Most previous studies analyse responses of species abundance without considering natural history traits associated with those species. This study uses fourth corner modelling techniques to investigate the interaction between ecological data and natural history trait information using a herpetofaunal assemblage that includes 19 species of amphibians, 28 snakes, and 20 lizards, in Parque Nacional Laguna del Tigre, Guatemala. A total of 120 transects were surveyed using Visual Encounter Surveys, comprising 18 in disturbed habitat, 66 in forest habitat, and 36 in edge habitat respectively. Overall, greater diversity of ecological traits was revealed in forest and edge habitats compared to disturbed habitats at the forest edge close to agricultural land. Models revealed that for amphibians (Hypopachus variolosus and Incilius valliceps) and snakes (Coniophanes schmidtii and Leptodeira septentrionalis), association with bare ground, and in the case of amphibians, leaf litter, predicts species persistence in disturbed habitats. Continued forest fragmentation in the region will result in increased edge effects, and a greater proportion of forest remaining in an early successional state, leading to a highly reduced, homogenized, amphibian and reptile assemblage. Using such models for community assemblages of animals to reveal the identity of WLR patterns in forests with continued fragmentation is a useful tool to reveal which species are at risk of impact before habitats become degraded.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 3","pages":"52"},"PeriodicalIF":2.3,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11897091/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605860","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

Negative effects of nitrogen fertilization on herbivore fitness are exaggerated at warmer temperatures and in high-altitude populations. 氮肥对草食动物适应性的负面影响在较高温度和高海拔种群中被夸大。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-11 DOI: 10.1007/s00442-025-05690-8

Ange Raharivololoniaina, Roland Busch, Franziska Deppe, Anna Hitzler, Eva Plath, Tamara Rischen, Mine Yilmazer, Klaus Fischer

{"title":"Negative effects of nitrogen fertilization on herbivore fitness are exaggerated at warmer temperatures and in high-altitude populations.","authors":"Ange Raharivololoniaina, Roland Busch, Franziska Deppe, Anna Hitzler, Eva Plath, Tamara Rischen, Mine Yilmazer, Klaus Fischer","doi":"10.1007/s00442-025-05690-8","DOIUrl":"10.1007/s00442-025-05690-8","url":null,"abstract":"Biodiversity is currently under strong pressure due to anthropogenic global change. Different drivers of global change may exert direct and indirect effects on biodiversity, and may furthermore interact with one another, but our respective knowledge is still very limited. We investigated indirect and interactive effects of two important drivers of global change, eutrophication and climate change, in replicated low- and high-altitude populations of an insect herbivore, the butterfly Lycaena tityrus, in a laboratory setting. We found local adaptation in developmental traits, with low-altitude populations being adapted to warmer temperatures and longer seasons. Lycaena tityrus responded negatively to agriculturally relevant levels of fertilization of its host plant, showing reduced body mass and prolonged development time. Negative effects were particularly pronounced at warmer temperatures and in high-altitude populations. Our study adds to the increasing knowledge that different drivers of global change may interact and thereby increase the overall level of threat to biodiversity. We suggest that populations inhabiting naturally nutrient-poor environments might be even more vulnerable to agricultural intensification than others, potentially applicable to many species. These findings may have important implications for protecting numerous vulnerable species in the face of rapid environmental change.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 3","pages":"51"},"PeriodicalIF":2.3,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11893656/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143597404","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

High-elevation birds grow more slowly but to heavier weights than low-elevation birds. 高海拔的鸟类比低海拔的鸟类长得更慢，但体重更重。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-07 DOI: 10.1007/s00442-025-05685-5

Yangyang Guo, Haixin Gao, Xin Lu

{"title":"High-elevation birds grow more slowly but to heavier weights than low-elevation birds.","authors":"Yangyang Guo, Haixin Gao, Xin Lu","doi":"10.1007/s00442-025-05685-5","DOIUrl":"10.1007/s00442-025-05685-5","url":null,"abstract":"Documenting how growth strategies diverge among populations or species occupying different geographical locations can contribute to understanding life-history evolution. However, the existing literature on the geography of growth focuses on latitudinal gradients, leaving the growth-elevation relationship enigmatic. The knowledge gap limits our ability to capture a full picture of growth evolution at macroecological scales because organisms typically experience different selective pressures across these two geographical gradients. We filled this gap using data from 163 populations of 111 passerine species breeding in mainland China over an elevational span of 8-4500 m. Phylogenetic comparative analyses revealed that controlling for potentially confounding variables, the growth rate of nestling body mass decreased and the nestling period became longer as elevation increased. Also, high-elevation nestlings fledged at a heavier body mass relative to the adult than their low-elevation congeners. The observed growth patterns, coupled with fewer, larger eggs and prolonged parental care as demonstrated by earlier studies, suggest that avian life histories have slowed down toward high elevations. The life-history strategy, which stands in contrast to the fast pace of life toward high latitudes, is likely a response to increasingly stressful conditions with elevation, especially the limited availability of food and oxygen.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 3","pages":"50"},"PeriodicalIF":2.3,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143573530","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

Comparison of seed traits between an invasive plant and its native competitor along a latitudinal gradient. 入侵植物与本土竞争植物种子性状沿纬度梯度的比较。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-06 DOI: 10.1007/s00442-025-05688-2

Hao-Yu Wang, Jiafang Huang, Liwen Zhang, Guanglong Qiu, Rencang Bu, Kam W Tang, Rob H Marrs, Chuan Tong

{"title":"Comparison of seed traits between an invasive plant and its native competitor along a latitudinal gradient.","authors":"Hao-Yu Wang, Jiafang Huang, Liwen Zhang, Guanglong Qiu, Rencang Bu, Kam W Tang, Rob H Marrs, Chuan Tong","doi":"10.1007/s00442-025-05688-2","DOIUrl":"10.1007/s00442-025-05688-2","url":null,"abstract":"Seeds are crucial for plant population maintenance and dispersal. Invasive species often exhibit seed traits that enhance their colonization success, such as increased dispersal potential, earlier germination, or greater resource reserves. However, few studies have compared seed traits between invasive and native plant species along environmental gradients. Here, we compared morphological traits and nutrient concentrations of the seeds of two competing species, the native common reed (Phragmites australis) and the invasive saltmarsh cordgrass (Spartina alterniflora), along a 20° latitudinal gradient of the Chinese coast, and their relationships with environmental factors. Significant differences were found between the two species for 11 of the 13 traits with respect to latitude. Specifically, the seed size of S. alterniflora decreased with increasing latitude, but P. australis showed a slight curvilinear relationship with latitude, reducing to a minimum between 30 and 35° N. The latitudinal variation in seed set showed the opposite trends in both species at high latitudes. Seed nitrogen concentration decreased with latitude in both species, while seed phosphorus concentration declined only in P. australis. We also identified that temperature-dependent climatic variables were more important than soil properties in affecting the latitudinal variations of seed traits for both species, especially for S. alterniflora. Based on the results, we predict that the greater fecundity of S. alterniflora populations poses an increasing threat to P. australis at the higher latitudes as temperature rises due to climate change.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 3","pages":"49"},"PeriodicalIF":2.3,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143573528","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

The trade-off between photosynthetic rate and thallus moisture-demand explains lichen habitat association with the temperate rainforest. 光合速率和菌体水分需求之间的权衡解释了地衣栖息地与温带雨林的关系。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-05 DOI: 10.1007/s00442-025-05687-3

Amaris Ormond, Christopher J Ellis, Claudia Colesie

{"title":"The trade-off between photosynthetic rate and thallus moisture-demand explains lichen habitat association with the temperate rainforest.","authors":"Amaris Ormond, Christopher J Ellis, Claudia Colesie","doi":"10.1007/s00442-025-05687-3","DOIUrl":"10.1007/s00442-025-05687-3","url":null,"abstract":"Temperate rainforests are globally rare, covering less than 1% of the Earth's surface, with 15% of their suitable climate space located in Europe. These ecosystems are uniquely defined by diverse cryptogamic species, particularly epiphytic lichens, which play crucial roles in forest biodiversity, trophic interactions, and biogeochemical processes. However, the ecophysiology of temperate rainforest lichens, with the potential to explain their regional to local distribution, their primary productivity, growth rates and biomass accumulation, remains under researched. This study asked whether the coexistence of morphologically different species within Scotland's temperate rainforest is driven by adaptation and subsequent species-sorting into contrasting microclimatic moisture environments. We examined seven species, analysing their biogeographic distributions and physiological responses to controlled moisture and light gradients to understand their degree of association with the temperate rainforest habitat. Our results indicated that species with the strongest temperate rainforest association had higher thallus water requirements (OptWC, MinWC and MaxWC) to achieve maximal photosynthesis (MaxNP) and that these appeared mediated by morphological traits. We found that, when morphological traits relating to water capture and retention, including layers of rhizine and tomentum, are linked to physiological optima, they can begin to explain how species across a spectrum of morphologies are differentially adapted or acclimated and associated to different degrees with the temperate rainforest climate. These findings also underscore the significance of ecophysiological knowledge for predicting the impacts of climate change on temperate rainforest biodiversity, since species' microhabitat responses will be pivotal in understanding broader ecological shifts.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 3","pages":"48"},"PeriodicalIF":2.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11882653/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143567029","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

Adaptive divergence in diets between the sexes in a tropical snake (Stegonotus australis, Colubridae). 一种热带蛇（南方剑齿蛇，剑齿蛇科）两性间饮食的适应性差异。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-05 DOI: 10.1007/s00442-025-05689-1

Gregory P Brown, Thomas Madsen, Richard Shine

{"title":"Adaptive divergence in diets between the sexes in a tropical snake (Stegonotus australis, Colubridae).","authors":"Gregory P Brown, Thomas Madsen, Richard Shine","doi":"10.1007/s00442-025-05689-1","DOIUrl":"10.1007/s00442-025-05689-1","url":null,"abstract":"Males and females within a population may differ in dietary composition either as a non-adaptive consequence of sexual dimorphism, or because specific food types enhance fitness more in one sex than the other. To test between those two explanations, we can ask whether the consumption of a food type (a) is constrained by sexually dimorphic traits such as body size, or (b) differentially benefits the sex that consumes that food more frequently. A 23-year field study of Slatey-Grey Snakes (Stegonotus australis) in tropical Australia provided data on 663 meals, of which 130 were reptile eggs (primarily from Keelback Snakes (Tropidonophis mairii)). Over the same range of snake SVLs, eggs were consumed more often by female than by male Slatey-Grey Snakes (25.8 versus 15.2% of records), but consumption of reptile eggs was independent of snake body size. Female Slatey-Grey Snakes were not more common or more active than males during Keelback nesting periods, but they were more likely to be captured in the vicinity of Keelback oviposition sites than were males. In years with higher availability of Keelback eggs, female Slatey-Grey Snakes had higher clutch sizes and clutch masses (plausibly reflecting the nutritional benefits of eating reptile eggs to provision reptile eggs). In combination, our results suggest an adaptive basis to the sex-based divergence in dietary composition in Slatey-Grey Snakes.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 3","pages":"47"},"PeriodicalIF":2.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11880039/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143557578","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

Infection intensity and severity of Ranavirus transmission in juvenile wood frogs. 林蛙幼体感染Ranavirus的强度和传播程度。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-04 DOI: 10.1007/s00442-025-05682-8

Maya R Rayle, Jesse L Brunner, Nicole C Dahrouge, Erin L Keller, Tracy A G Rittenhouse

{"title":"Infection intensity and severity of Ranavirus transmission in juvenile wood frogs.","authors":"Maya R Rayle, Jesse L Brunner, Nicole C Dahrouge, Erin L Keller, Tracy A G Rittenhouse","doi":"10.1007/s00442-025-05682-8","DOIUrl":"10.1007/s00442-025-05682-8","url":null,"abstract":"Ranaviruses are responsible for mass die offs of wood frog (Lithobates sylvaticus) tadpoles. What happens in between epidemics is less clear, but juvenile (metamorphosed) stages are hypothesized to move Ranaviruses among wetlands and introduce or reintroduce these viruses into wetlands, initiating new outbreaks. A key question is under what circumstances can juvenile L. sylvaticus infect susceptible conspecifics. We examined Ranavirus transmission between juvenile L. sylvaticus in two settings: first, we measured transmission from a Ranavirus-infected frog to a co-housed susceptible frog via cohabitation over a range of exposure periods. Second, we measured indirect transmission to susceptible frogs from a contaminated environment after a range of waiting times (i.e., from when the infected frog was removed to when the susceptible frog was exposed to the environment). We present evidence that juvenile frogs directly transmitted Ranavirus to susceptible frogs in all exposure periods (99.2% infected), with as little as 1 h of co-housing resulting in 95.8% of susceptibles infected. Indirectly, 96.8% of susceptible frogs became infected after as long as 48 h waiting times. Neither exposure period nor wait times influenced the probability of infection, because these probabilities are already high. In our linear regression models, susceptible frog viral load was significantly correlated with exposure period and cohort for the cohabitation experiment, while wait time was significantly correlated with viral load for the sequential habitation experiment. Collectively, our results suggest that Ranavirus transmission readily occurs between recently metamorphosed wood frogs and via terrestrial environmental exposure.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 3","pages":"46"},"PeriodicalIF":2.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11880146/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143542953","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

Good moms: dependent young and their mothers cope better than others with longer dry season in plains zebras. 好妈妈：与其他斑马相比，平原斑马的依赖性较强的幼崽和它们的母亲能更好地应对较长的旱季。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-03-01 DOI: 10.1007/s00442-025-05676-6

Lucie Thel, Christophe Bonenfant, Simon Chamaillé-Jammes

{"title":"Good moms: dependent young and their mothers cope better than others with longer dry season in plains zebras.","authors":"Lucie Thel, Christophe Bonenfant, Simon Chamaillé-Jammes","doi":"10.1007/s00442-025-05676-6","DOIUrl":"10.1007/s00442-025-05676-6","url":null,"abstract":"In large herbivores, the timing of births often coincides with the seasonal peak of food resources availability, likely to improve juvenile survival and reduce reproduction costs. Some species, however, breed year-round, even in seasonal environments. Demographic processes, such as to what extent being born during the lean season reduces survival of juveniles and reproductive females, remain understudied in large mammals inhabiting tropical ecosystems. We investigated survival rates in plains zebras (Equus quagga) in Hwange National Park (Zimbabwe), a highly seasonal savanna ecosystem. We used capture-recapture models to analyse long-term demographic data (2008-2019). We investigated the effect of seasonality as a categorical (wet versus dry season) and continuous (duration of the dry season) variable on survival. We found little variability in early juvenile survival (φ = 0.458 ± 0.044 SE, < 6 m.o.), whereas late juvenile and yearling survivals were higher and decreased with increasing length of the dry season (from 0.850 ± 0.095 SE to 0.480 ± 0.120 SE). Female survival was high (> 0.703 ± 0.057 SE and up to 0.995 ± 0.006 SE) but decreased with exposure to the dry season in non-reproductive females. The probability of females becoming reproductive in the following year was not affected by the length of the dry season (0.423 and 0.420 for reproductive and non-reproductive females, respectively). Our results highlight the importance of individual quality in reproductive performance, as reproductive females seem to buffer the effect of environmental variability on their own survival and that of their foal.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 3","pages":"45"},"PeriodicalIF":2.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143537377","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