Oecologia最新文献_第6页

Changes of cyprinid fishery resources in Lake Biwa over 57 years: association with multiple stressors and restoration measures. 琵琶湖鲤类渔业资源57年来的变化：多压力源与恢复措施的关联

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-07-02 DOI: 10.1007/s00442-025-05762-9

Shin-Ichiro S Matsuzaki, Keiichi Fukaya, Kohji Mabuchi, Takeshi Kikko, Noriko Takamura

{"title":"Changes of cyprinid fishery resources in Lake Biwa over 57 years: association with multiple stressors and restoration measures.","authors":"Shin-Ichiro S Matsuzaki, Keiichi Fukaya, Kohji Mabuchi, Takeshi Kikko, Noriko Takamura","doi":"10.1007/s00442-025-05762-9","DOIUrl":"10.1007/s00442-025-05762-9","url":null,"abstract":"Multiple stressors can threaten the resources of inland fisheries, but responses to these stressors may differ among fish species. We used a long-term fishery dataset to quantify the CPUE trajectories of eight cyprinid taxa in the south basin of Lake Biwa that have been stressed by lakeshore development, artificial water-level regulation, exotic fish species, and climate change. A Bayesian state-space model revealed that the CPUEs of all eight taxa substantially declined from 1966 to 2022. For Opsariichthys uncirostris, Ischikauia steenackeri, Sarcocheilichthys spp., Cyprinus carpio, and Carassius spp., the average population growth rates decreased from 1976 to 1991, when lakeshore development occurred and largemouth bass populations increased dramatically. For the three remaining taxa (Zacco platypus, Gnathopogon caerulescens, and Squalidus spp.), the average population growth rates decreased from 1992 to 2022, when new water-level regulations were implemented and bluegill populations increased substantially. The former five taxa exhibited longer maximum body length and life span, later maturation, and higher fecundity than the latter three taxa. This suggests that life-history traits may determine how species respond to different stressors. Unlike the effects of these three abrupt stressors, those of climate, a gradual stressor, were negative for seven taxa, although not statistically significant. We also found that the population growth rates of Gnathopogon caerulescens and Ischikauia steenackeri increased recently after implementation of restoration measures (fishing moratorium and stocking of paddy-reared/captive-bred individuals). Our results suggest that cumulative anthropogenic stressors depleted the resource of cyprinids but that the outcome of current restoration measures may be positive.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"121"},"PeriodicalIF":2.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12222436/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144554055","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

Biological nitrogen fixation activity by co-occurring moss species is affected by their ability to absorb nitrogen from canopy throughfall. 共生苔藓的生物固氮活性受其从冠层穿透物中吸收氮的能力的影响。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-07-02 DOI: 10.1007/s00442-025-05751-y

Charlotte Blasi, Daniel Houle, Gaëlle Vacherand, Jean-Philippe Bellenger

{"title":"Biological nitrogen fixation activity by co-occurring moss species is affected by their ability to absorb nitrogen from canopy throughfall.","authors":"Charlotte Blasi, Daniel Houle, Gaëlle Vacherand, Jean-Philippe Bellenger","doi":"10.1007/s00442-025-05751-y","DOIUrl":"10.1007/s00442-025-05751-y","url":null,"abstract":"Biological nitrogen fixation in feathermosses provides an important source of exogenous nitrogen to boreal forest ecosystems. Yet there is a limited understanding of how canopy condition and throughfall influence N fixation rates. To decipher the effect of climatic variables (i.e., temperature, humidity, and light) and nitrogen deposition chemistry (i.e., inorganic and organic N) on moss BNF, we monitored climatic variables, biological N2-fixation, cyanobacteria biomass, and some moss traits of two co-occurring moss species in black spruce forests in Eastern Canada (Pleurozium schreberi and Ptilium crista-castrensis) over two growing seasons in undisturbed mature forests and forest gaps (windfalls). We further investigated the ability of both species to retrieve nitrogen from deposition using 15N tracers in the field and the lab. Both species achieved comparable BNF in forest gaps. In the mature forest, BNF decreased in both species compared to the forest gap but was significantly higher in P. crista-castrensis (about 10 fold) than in P. schreberi. In both species, the decrease in BNF activity between forest gaps and mature forests was likely driven by the slightly less favorable climatic conditions for BNF (e.g., temperature and light). However, BNF was further reduced in P. schreberi due to better nitrogen sorption from the throughfall leading to reduced cyanobacteria colonization and cyanobacteria-specific BNF activity. These results show that co-occurring moss species are affected in a contrasted manner by changes in the composition of nitrogen deposition.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"119"},"PeriodicalIF":2.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541629","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

Sex and age predict habitat selection in the world's most geographically extensive lion population. 性别和年龄预测了世界上地理上最广泛的狮子种群的栖息地选择。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-07-02 DOI: 10.1007/s00442-025-05744-x

Dominik T Bauer, Genevieve E Finerty, M Kristina Kesch, Christos Astaras, Robert A Montgomery, David Heit, Joerg U Ganzhorn, David W Macdonald, Andrew J Loveridge

{"title":"Sex and age predict habitat selection in the world's most geographically extensive lion population.","authors":"Dominik T Bauer, Genevieve E Finerty, M Kristina Kesch, Christos Astaras, Robert A Montgomery, David Heit, Joerg U Ganzhorn, David W Macdonald, Andrew J Loveridge","doi":"10.1007/s00442-025-05744-x","DOIUrl":"10.1007/s00442-025-05744-x","url":null,"abstract":"Conservation of large carnivore populations requires effective management strategies that promote landscape-scale protection and genetic connectivity. Pivotal to the success of these strategies is sufficient evidence, including quantifying the processes that govern species distribution. We used telemetry data from 63 lions from the Kavango-Zambezi Transfrontier Conservation Area (KAZA TFCA) in southern Africa to analyze inter-demographic differences in habitat relationships using a mixed-effects resource selection analysis approach. In this semi-arid landscape, some of the most important drivers of habitat selection are surface water and precipitation, which in turn regulate prey abundance. Predicted relative probability of habitat selection was highest near water irrespective of age and sex; however, the effect of precipitation varied depending on the demographic class. Adult lions and subadult females preferred habitat with above average rainfall; however, the opposite was true for subadult males which showed a strong aversion to precipitation. Across all four demographic classes, relative probability of habitat selection was generally positively associated with higher levels of prey abundance with the exception of gemsbok which was negatively correlated with adult female, subadult male, and subadult female habitat use. The predicted distributions for all four demographic classes were widespread across multiple different land-use types, highlighting the need to extend the traditional concept of formally protected areas to include multi-use landscapes and support large-scale transboundary conservation initiatives.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"120"},"PeriodicalIF":2.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12222360/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144554057","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

Sensitivity to elevated salinity in coastal dune plants. 海岸沙丘植物对盐度升高的敏感性。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-07-01 DOI: 10.1007/s00442-025-05759-4

Anna Halpin-McCormick, Tamara Sherrill, Catherine Davenport, Dustin Wolkis, Seana K Walsh, Kasey E Barton

{"title":"Sensitivity to elevated salinity in coastal dune plants.","authors":"Anna Halpin-McCormick, Tamara Sherrill, Catherine Davenport, Dustin Wolkis, Seana K Walsh, Kasey E Barton","doi":"10.1007/s00442-025-05759-4","DOIUrl":"10.1007/s00442-025-05759-4","url":null,"abstract":"Coastal dune plants provide critical ecosystem and cultural services, which are severely threatened by ongoing climate change and sea-level rise. Coastal habitats account for a disproportionate extent of land on islands, emphasizing the importance of these ecosystems for island biodiversity. We investigated salinity tolerance in a diverse pool of 19 native and invasive plant species from Hawai'i's coastal dunes for insights into their vulnerability to sea-level rise. Salinity tolerance was investigated experimentally in seedling and juveniles by treating plants with artificial seawater for 3 weeks, followed by a 2-week freshwater recovery period. For mechanistic insights, stomatal conductance and leaf chlorophyll content were measured before, during, and after seawater treatment. Salinity tolerance was highly variable among species. The least tolerant species experienced 100% mortality and up to 95% reductions in growth in seawater compared to freshwater conditions. The most tolerant species grew more in seawater, consistent with a halophytic strategy. Most species had intermediate salinity tolerance, with generally high survival and variable reductions in growth under seawater treatment. Phenotypic plasticity in stomatal conductance and chlorophyll content was widespread, and species that maintained the highest levels of stomatal conductance and leaf chlorophyll content under seawater had the greatest biomass tolerance. Despite growing in close proximity to the ocean, Hawai'i's coastal dune plants are highly variable in salinity tolerance, and sea-level rise is likely to be a major threat, leading to reduced seedling establishment and population declines in some species, with cascading effects on associating biodiversity, emphasizing the need for urgent conservation actions.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"117"},"PeriodicalIF":2.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541631","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

Contrasting risk patterns from human hunters and a large carnivore influence the habitat selection of shared prey. 来自人类猎人和大型食肉动物的不同风险模式影响了共同猎物的栖息地选择。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-07-01 DOI: 10.1007/s00442-025-05742-z

G Ausilio, C Wikenros, H Sand, O Devineau, P Wabakken, A Eriksen, M Aronsson, J Persson, K M Mathisen, B Zimmermann

{"title":"Contrasting risk patterns from human hunters and a large carnivore influence the habitat selection of shared prey.","authors":"G Ausilio, C Wikenros, H Sand, O Devineau, P Wabakken, A Eriksen, M Aronsson, J Persson, K M Mathisen, B Zimmermann","doi":"10.1007/s00442-025-05742-z","DOIUrl":"10.1007/s00442-025-05742-z","url":null,"abstract":"Spatial patterns of human hunting and predation risk are mediated by the physical landscape, with hunting risk often associated with different habitat features than those linked to large carnivores. Risk from hunters and carnivores also varies over time, and prey may adjust anti-predator strategies accordingly. We used GPS data from 17 female moose (Alces alces) tracked over two fall-winter seasons (2018-2020) in south-central Scandinavia to study moose habitat selection in response to diel and seasonal variation in risk from wolves (Canis lupus) and human hunters. Predation risk was quantified using spatial models based on known wolf and hunter kill-sites. We applied resource selection functions and Generalized Additive Mixed Models to model moose habitat selection in response to wolf and hunting risk. Moose avoided high-risk hunting areas during the day throughout the hunting season but relaxed this avoidance at night and after the season ended. In contrast, we found no evidence that moose adjusted habitat use in response to diel or seasonal variation in wolf predation risk. These results suggest that human hunting was the primary driver of moose habitat selection during the hunting season, becoming less relevant when hunting ceased. Our findings highlight the dominant role of human risk in shaping prey behaviour and the importance of accounting for hunting when evaluating predator-prey dynamics in human-dominated systems. An increased understanding of the risk effects arising from humans and large carnivores on prey can deepen our understanding of the ecological roles of predators and humans.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"118"},"PeriodicalIF":2.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12213882/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541630","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

Tissue-specific energetics of the invasive Asian shore crab Hemigrapsus sanguineus throughout its range and through time. 入侵的亚洲滨蟹血石蟹在其分布范围和时间上的组织特异性能量学。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-06-28 DOI: 10.1007/s00442-025-05756-7

Blaine D Griffen, Laura S Fletcher, Tanner C Reese, Michele F Repetto, Nanette Smith, Carter K Stancil, Benjamin J Toscano

{"title":"Tissue-specific energetics of the invasive Asian shore crab Hemigrapsus sanguineus throughout its range and through time.","authors":"Blaine D Griffen, Laura S Fletcher, Tanner C Reese, Michele F Repetto, Nanette Smith, Carter K Stancil, Benjamin J Toscano","doi":"10.1007/s00442-025-05756-7","DOIUrl":"10.1007/s00442-025-05756-7","url":null,"abstract":"Organisms with broad geographic distributions that inhabit seasonal environments often demonstrate characteristics that differ spatially and temporally. It has been hypothesized that these variable characteristics may play important roles in the success of invasive species. Further, physiological characteristics should be closely linked to individual energetic strategies, which can also vary spatially and temporally. We use tissue-specific energy density and total energy content to examine energy allocation strategies in the invasive Asian shore crab Hemigrapsus sanguineus across seasons and throughout its North American invasive range. We show that tissue energy density and total tissue energy vary considerably with location and season. Energetic strategies are consistent with an expanding northern range edge and a static southern range edge. Our results also provide insight into patterns that occur broadly across phylogeny, including reduced growth rates with body size and seasonal reproductive patterns. This study demonstrates the utility of tissue-specific energetics as an ecophysiological tool for understanding the energetic strategies of invasive (and other) species throughout their ranges and across seasons.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"116"},"PeriodicalIF":2.3,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144529043","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

Altered surface behaviour in earthworms (Lumbricus terrestris) under artificial light at night. 夜间人工光照下蚯蚓（Lumbricus terrestris）表面行为的改变

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-06-27 DOI: 10.1007/s00442-025-05750-z

Jiaqing Cai, Jonathan Bennie, Kevin J Gaston

{"title":"Altered surface behaviour in earthworms (Lumbricus terrestris) under artificial light at night.","authors":"Jiaqing Cai, Jonathan Bennie, Kevin J Gaston","doi":"10.1007/s00442-025-05750-z","DOIUrl":"10.1007/s00442-025-05750-z","url":null,"abstract":"Artificial light at night (ALAN) has been spreading rapidly globally, disrupting animal physiology, behaviour and associated ecosystem processes. However, impacts on soil-dwelling animals that are nocturnally active aboveground remain underexplored. Here, we examined these for the earthworm Lumbricus terrestris L., an ecosystem engineer that frequently surfaces at night. We recorded four types of L. terrestris nighttime surface behaviour, including overall surface activity, and three finer categories: risk exploration before surfacing, foraging and over-surface exploration. One experiment (controlled-temperature-room-based) tested these behavioural responses to seven ALAN levels, whilst another (field-based) investigated whether behavioural responses can consequently affect litter removal and soil respiration. In the controlled-temperature room, compared to darkness, L. terrestris significantly decreased their overall nighttime foraging at ALAN levels of 10 lx and above, with these negative ALAN effect sizes increasing with light intensity. With more risk exploration before surfacing, L. terrestris still showed greatly reduced foraging activity at the 10 lx ALAN level in the field. However, such altered behaviour did not cause clear patterns in either litter removal or soil respiration. Our results confirm that 10 lx ALAN (or potentially lower) is effective in disrupting L. terrestris nighttime surface behaviour, but this may have limited impacts on short-term C cycling.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"114"},"PeriodicalIF":2.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12205020/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144507155","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

Energetic benefits of prey choice for a shark-eating shark. 对吃鲨鱼的鲨鱼来说，选择猎物的能量优势。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-06-27 DOI: 10.1007/s00442-025-05758-5

Erin T Spencer, Lisa A Hoopes, Jack J Morris, Demian D Chapman, Valerie Hagan, Mark Johnson, Nicholas L Payne, Yuuki Y Watanabe, Ruth E Dunn, Yannis P Papastamatiou

{"title":"Energetic benefits of prey choice for a shark-eating shark.","authors":"Erin T Spencer, Lisa A Hoopes, Jack J Morris, Demian D Chapman, Valerie Hagan, Mark Johnson, Nicholas L Payne, Yuuki Y Watanabe, Ruth E Dunn, Yannis P Papastamatiou","doi":"10.1007/s00442-025-05758-5","DOIUrl":"10.1007/s00442-025-05758-5","url":null,"abstract":"Optimal foraging theory has been used to understand the foraging choices of animals but is rarely applied to large predatory fishes due to difficulties measuring their behavior in the wild. Great hammerhead sharks (Sphyrna mokarran) are atypical among sharks in that they prefer large prey, such as other sharks and large teleost species, rather than smaller teleost or invertebrate prey. Great hammerheads are known to hunt blacktip sharks (Carcharhinus limbatus) that form large seasonal aggregations off the coast of southern Florida. However, the foraging advantage of this dietary choice and hunting strategy is unclear. We equipped great hammerheads with biologging sensors (speed, video, sonar) to estimate swimming metabolic rates and prey encounter rates and then model the foraging benefits of hunting large prey (sharks) versus small prey (reef-associated teleosts). We estimate great hammerheads need to consume 0.7% body weight (BW) per day of shark prey or 0.9% BW per day of teleost prey. Our foraging model predicts that a ~ 110 kg hammerhead would only need to consume a whole ~ 25 kg blacktip shark once every 3 weeks and could survive 2 months during low blacktip density periods without feeding before starving to death. However, it would need to capture one to two ~ 1 kg teleost per day to avoid falling below its energetic baseline. Great hammerhead sharks may obtain significant benefits by hunting sharks in southern Florida, especially during the winter when prey density is high.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"113"},"PeriodicalIF":2.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144507156","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

Swollen-thorn acacias increased their investments in resident ants during an El Niño event. 在El Niño活动期间，肿刺金合欢增加了对蚂蚁的投资。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-06-27 DOI: 10.1007/s00442-025-05763-8

Cristian E Molina, Jonah M Naugle, Maikol Guevara, Emmy B Zeilstra, Yorlenis González, Sabrina Amador Vargas

{"title":"Swollen-thorn acacias increased their investments in resident ants during an El Niño event.","authors":"Cristian E Molina, Jonah M Naugle, Maikol Guevara, Emmy B Zeilstra, Yorlenis González, Sabrina Amador Vargas","doi":"10.1007/s00442-025-05763-8","DOIUrl":"10.1007/s00442-025-05763-8","url":null,"abstract":"Species interactions are frequently context-specific. Climate fluctuations can inflict stress on individuals, inducing plasticity in their behavior or changes in resource allocation. Obligate mutualisms may be particularly sensitive to such fluctuations if they affect the quantity, quality, or timing of investments between partners. In the obligate mutualism between Pseudomyrmex ants and swollen-thorn acacias (Vachellia collinsii), the ants defend their host plant in exchange for domatia, extrafloral nectar, and protein-rich Beltian bodies. Ant reward size is known to vary temporally and according to the identity of the associated ant partner, with better-quality defenders (P. spinicola and P. simulans) receiving relatively more plant resources than non-defending ants. We studied how an El Niño-related drought impacted the investments of acacias in their ant colonies. Hence, we resampled acacias that were previously measured for ant rewards during a neutral El Niño Southern Oscillation period again during El Niño 2023. We predicted that water limitations would reduce the resources available for allocation toward ant colonies and that acacias hosting obligate-nesting Pseudomyrmex would show a greater decrease in ant rewards compared to plants associated with non-defending ants (Crematogaster sp.). Unexpectedly, we found that acacias allocated more resources to ant rewards in 2023, irrespective of the ant partner. Heightened herbivore pressure, increased light availability, decreased precipitation, or a combination of these factors could explain why acacias invested more in mutualism with ants. Though the long-term consequences of these climate fluctuations remain unknown, this work highlights the plasticity of coevolved mutualistic interactions in the face of global change.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"115"},"PeriodicalIF":2.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144512253","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

Causes and consequences of long-term defaunation in multi-species aggregations: species traits predict freshwater mussel declines and decreases in biogeochemical storage and recycling. 多物种聚集长期退化的原因和后果：物种特征预测淡水贻贝数量下降和生物地球化学储存和再循环减少。

IF 2.3 2区环境科学与生态学

Oecologia Pub Date : 2025-06-26 DOI: 10.1007/s00442-025-05755-8

Jonathan W Lopez, Carla L Atkinson, Caryn C Vaughn

{"title":"Causes and consequences of long-term defaunation in multi-species aggregations: species traits predict freshwater mussel declines and decreases in biogeochemical storage and recycling.","authors":"Jonathan W Lopez, Carla L Atkinson, Caryn C Vaughn","doi":"10.1007/s00442-025-05755-8","DOIUrl":"10.1007/s00442-025-05755-8","url":null,"abstract":"One of the foremost challenges in contemporary ecology is understanding the rapid loss of animal diversity and biomass, known as defaunation. The causes and consequences of defaunation depend on species traits that regulate which species are vulnerable to stressors and the ecosystem-level consequences of declines. We used a > 30-year long-term monitoring dataset collected from 21 sites in 4 rivers in south-eastern Oklahoma, USA, and a trait-based framework to identify defaunation in multi-species freshwater animal aggregations (freshwater mussels). We detected mussel density declines in 2 of the 4 rivers, encompassing 67% of the study sites. In the defaunated rivers, losses of mussel density led to biomass declines and losses of mussel-generated carbon and nutrient recycling and storage. Mussel aggregations only became defaunated in rivers where hydrologic data suggested drought-like conditions. There was also a regional increase in temperature, suggesting that low flows and high temperatures may have negatively impacted mussel populations in the defaunated rivers. Declines did not differ among thermal tolerance guilds-rather, declines were driven by species with life-history traits adapted for stable hydrologic conditions. Given the significant role that river ecosystems play in global biogeochemical processes, freshwater defaunation may have major consequences if continued unchecked. More broadly, trait-based approaches show clear promise for advancing the predictive capacity of animal ecology.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"207 7","pages":"111"},"PeriodicalIF":2.3,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497571","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