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Multiple resiliency metrics reveal complementary drivers of ecosystem persistence: An application to kelp forest systems 多种复原力指标揭示生态系统持续性的互补驱动因素:海藻森林系统的应用。
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-27 DOI: 10.1002/ecy.4453
Jorge Arroyo-Esquivel, Riley Adams, Sarah Gravem, Ross Whippo, Zachary Randell, Jason Hodin, Aaron W. E. Galloway, Brian Gaylord, Marissa L. Baskett
{"title":"Multiple resiliency metrics reveal complementary drivers of ecosystem persistence: An application to kelp forest systems","authors":"Jorge Arroyo-Esquivel,&nbsp;Riley Adams,&nbsp;Sarah Gravem,&nbsp;Ross Whippo,&nbsp;Zachary Randell,&nbsp;Jason Hodin,&nbsp;Aaron W. E. Galloway,&nbsp;Brian Gaylord,&nbsp;Marissa L. Baskett","doi":"10.1002/ecy.4453","DOIUrl":"10.1002/ecy.4453","url":null,"abstract":"<p>Human-caused global change produces biotic and abiotic conditions that increase the uncertainty and risk of failure of restoration efforts. A focus of managing for resiliency, that is, the ability of the system to respond to disturbance, has the potential to reduce this uncertainty and risk. However, identifying what drives resiliency might depend on how one measures it. An example of a system where identifying how the drivers of different aspects of resiliency can inform restoration under climate change is the northern coast of California, where kelp experienced a decline in coverage of over 95% due to the combination of an intense marine heat wave and the functional extinction of the primary predator of the kelp-grazing purple sea urchin, the sunflower sea star. Although restoration efforts focused on urchin removal and kelp reintroduction in this system are ongoing, the question of how to increase the resiliency of this system to future marine heat waves remains open. In this paper, we introduce a dynamical model that describes a tritrophic food chain of kelp, purple urchins, and a purple urchin predator such as the sunflower sea star. We run a global sensitivity analysis of three different resiliency metrics (recovery likelihood, recovery rate, and resistance to disturbance) of the kelp forest to identify their ecological drivers. We find that each metric depends the most on a unique set of drivers: Recovery likelihood depends the most on live and drift kelp production, recovery rate depends the most on urchin production and feedbacks that determine urchin grazing on live kelp, and resistance depends the most on feedbacks that determine predator consumption of urchins. Therefore, an understanding of the potential role of predator reintroduction or recovery in kelp systems relies on a comprehensive approach to measuring resiliency.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4453","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142515252","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
Attenuated asymmetry of above- versus belowground stoichiometry to a decadal nitrogen addition during stand development 在林木生长过程中,地上与地下的化学计量对十年期氮添加量的不对称影响减弱。
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-27 DOI: 10.1002/ecy.4458
Shijie Ning, Xinru He, Tian Ma, Tao Yan
{"title":"Attenuated asymmetry of above- versus belowground stoichiometry to a decadal nitrogen addition during stand development","authors":"Shijie Ning,&nbsp;Xinru He,&nbsp;Tian Ma,&nbsp;Tao Yan","doi":"10.1002/ecy.4458","DOIUrl":"10.1002/ecy.4458","url":null,"abstract":"<p>Deciphering the linkage between ecological stoichiometry and ecosystem functioning under anthropogenic nitrogen (N) deposition is critical for understanding the impact of afforestation on terrestrial carbon (C) sequestration. However, the specific changes in above- versus belowground stoichiometric asymmetry with stand age in response to long-term N addition remain poorly understood. In this study, we investigated changes in stoichiometry following a decadal addition of three levels of N (control, no N addition; low N addition, 20 kg N ha<sup>−1</sup> year<sup>−1</sup>; high N addition, 50 kg N ha<sup>−1</sup> year<sup>−1</sup>) in young, intermediate, and mature stands in three temperate larch plantations (<i>Larix principis-rupprechtii</i>) in North China. We found that low N addition had no impact on both above- (leaf and litter) and belowground (soil and microbe) stoichiometry. In contrast, high N addition resulted in significant asymmetry in above- versus belowground stoichiometry, which then diminished during stand development. Following 10 years of N inputs, the young and intermediate plantations transitioned from a state of relative N limitation to co-limitation by both N and phosphorus (P), whereas the mature plantation continued to experience relative N limitation. Conversely, soil microorganisms exhibited relative P limitation in all three plantations. Broader niche differentiation (N limitation for trees, but P limitation for microorganisms) under long-term N input may have been responsible for the faster attainment of stoichiometric homeostasis in mature plantations than in young plantations. Our findings provide stoichiometric-based insight into the operating mechanisms of large C sinks in young forests, particularly above- versus belowground C stock asymmetry, and highlight the need to consider the role of flexible stoichiometry when forecasting future forest C sinks.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142515251","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
Temporal variability and predictability predict alpine plant community composition and distribution patterns 预测高山植物群落组成和分布模式的时变性和可预测性
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-26 DOI: 10.1002/ecy.4450
William J. Reed, Aaron J. Westmoreland, Katharine N. Suding, Daniel F. Doak, William D. Bowman, Nancy C. Emery
{"title":"Temporal variability and predictability predict alpine plant community composition and distribution patterns","authors":"William J. Reed,&nbsp;Aaron J. Westmoreland,&nbsp;Katharine N. Suding,&nbsp;Daniel F. Doak,&nbsp;William D. Bowman,&nbsp;Nancy C. Emery","doi":"10.1002/ecy.4450","DOIUrl":"10.1002/ecy.4450","url":null,"abstract":"<p>One of the most reliable features of natural systems is that they change through time. Theory predicts that temporally fluctuating conditions shape community composition, species distribution patterns, and life history variation, yet features of temporal variability are rarely incorporated into studies of species–environment associations. In this study, we evaluated how two components of temporal environmental variation—variability and predictability—impact plant community composition and species distribution patterns in the alpine tundra of the Southern Rocky Mountains in Colorado (USA). Using the Sensor Network Array at the Niwot Ridge Long-Term Ecological Research site, we used in situ, high-resolution temporal measurements of soil moisture and temperature from 13 locations (“nodes”) distributed throughout an alpine catchment to characterize the annual mean, variability, and predictability in these variables in each of four consecutive years. We combined these data with annual vegetation surveys at each node to evaluate whether variability over short (within-day) and seasonal (2- to 4-month) timescales could predict patterns in plant community composition, species distributions, and species abundances better than models that considered average annual conditions alone. We found that metrics for variability and predictability in soil moisture and soil temperature, at both daily and seasonal timescales, improved our ability to explain spatial variation in alpine plant community composition. Daily variability in soil moisture and temperature, along with seasonal predictability in soil moisture, was particularly important in predicting community composition and species occurrences. These results indicate that the magnitude and patterns of fluctuations in soil moisture and temperature are important predictors of community composition and plant distribution patterns in alpine plant communities. More broadly, these results highlight that components of temporal change provide important niche axes that can partition species with different growth and life history strategies along environmental gradients in heterogeneous landscapes.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142490402","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
Gastrointestinal morphology is an effective functional dietary proxy that predicts small mammal community structure 胃肠道形态是预测小型哺乳动物群落结构的有效功能性膳食替代物
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-25 DOI: 10.1002/ecy.4454
Olivia S. Chapman, Bryan S. McLean
{"title":"Gastrointestinal morphology is an effective functional dietary proxy that predicts small mammal community structure","authors":"Olivia S. Chapman,&nbsp;Bryan S. McLean","doi":"10.1002/ecy.4454","DOIUrl":"10.1002/ecy.4454","url":null,"abstract":"<p>The availability and quality of food resources can alter the intensity of competition and predation pressure within communities. Understanding species capacity to respond to global change-driven shifts in resource distribution is therefore crucial for biodiversity conservation. Small mammal communities are often structured by competition for food resources, but understanding and monitoring these processes are currently hindered by lack of functional dietary trait information in these hard-to-sample systems. In this study, we collected a comprehensive suite of gastrointestinal (GI) measurements from 26 small mammal species (including some never reported), compared them with more traditional craniodental traits in predicting dietary guild, and used them in a novel way to understand how diet structures 22 small mammal communities across the Appalachian Mountains of eastern North America. As predicted, we found GI traits to be effective dietary trait proxies; they were equally or more accurate than craniodental proportions in predicting the dietary guild of individual species. Furthermore, at the community level, we found that both the mean and functional dispersion of GI length were positively correlated with latitude and measures of temperature seasonality. Our results indicate that small mammal communities in more seasonal environments are filtered to include species with longer GI tracts (on average) as well as those that can partition food resources more finely, as expected based on the lower productivity of these regions. Conversely, communities in less seasonal environments display functional redundancy from the addition of species with short to intermediate GI lengths. Proportions of the GI tract represent novel dietary traits that can illuminate community assembly processes across regional environmental gradients and in the face of changing timing and availability of resources.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4454","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142490806","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
Temporal and spatial variation in reproductive benefits in a partial migrant 部分迁徙者生殖收益的时空变化
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-25 DOI: 10.1002/ecy.4451
Stephanie Witczak, Urs G. Kormann, Benedetta Catitti, Patrick Scherler, Valentijn van Bergen, Martin U. Grüebler
{"title":"Temporal and spatial variation in reproductive benefits in a partial migrant","authors":"Stephanie Witczak,&nbsp;Urs G. Kormann,&nbsp;Benedetta Catitti,&nbsp;Patrick Scherler,&nbsp;Valentijn van Bergen,&nbsp;Martin U. Grüebler","doi":"10.1002/ecy.4451","DOIUrl":"10.1002/ecy.4451","url":null,"abstract":"<p>In partial migrant systems, where residents and migrants coexist within a population, residents are commonly predicted to gain a reproductive advantage over migrants through priority access to high-quality territories and an earlier breeding start. Annual variation in reproductive benefits has been suggested to be important for the coexistence of both strategies in a population, as differences in wintering conditions experienced by the two strategies may result in a periodic reproductive advantage for migrants. However, the importance of spatial environmental variation for reproductive output in partially migrant populations remains largely unexplored. We investigated variation in the reproductive output of migrants and residents in a population of Swiss red kites (<i>Milvus milvus</i>) both temporally, across and within years, and spatially, along an elevational gradient. We gathered 4 years of reproductive data combined with 183 GPS-derived full annual cycles from individuals breeding in the Swiss Alpine foothills. At low, but not high, elevations, residents produced more fledglings than migrants. We also found evidence for annual variation in the reproductive advantage of the two strategies. Furthermore, while reproductive output did decline with a later breeding start, there was no difference in the start of breeding between the two migration strategies. The results of this study suggest that differences in reproductive output between migrants and residents in partial migrant populations can vary both due to the use of spatially distinct overwintering grounds and because the strategies are differently affected by spatial variables in the breeding area, such as elevation. The study emphasizes that spatial and temporal variation in reproductive benefits must be considered when predicting how migratory species will respond to future environmental change.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4451","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142490779","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
Leaf architecture and functional traits for 122 species at the University of California Botanical Garden at Berkeley 加州大学伯克利分校植物园 122 个物种的叶片结构和功能特征
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-25 DOI: 10.1002/ecy.4436
Ilaine Silveira Matos, Mickey Boakye, Monica Antonio, Sonoma Carlos, Ashley Chu, Miguel A. Duarte, Andrea Echevarria, Adrian Fontao, Lisa Garcia, LeeAnn Huang, Breanna Carrillo Johnson, Shama Joshi, Diana Kalantar, Srinivasan Madhavan, Samantha McDonough, Izzi Niewiadomski, Nathan Nguyen, Hailey Jiyoon Park, Caroline Pechuzal, James Rohde, Roshni Sahu, Meg Scudder, Satvik Sharma, LeeDar Sneor, Jason To, Bradley Vu, Natalie Vuong, Nicole Yokota, Luiza M. T. Aparecido, Holly Forbes, Mark Fricker, Benjamin Blonder
{"title":"Leaf architecture and functional traits for 122 species at the University of California Botanical Garden at Berkeley","authors":"Ilaine Silveira Matos,&nbsp;Mickey Boakye,&nbsp;Monica Antonio,&nbsp;Sonoma Carlos,&nbsp;Ashley Chu,&nbsp;Miguel A. Duarte,&nbsp;Andrea Echevarria,&nbsp;Adrian Fontao,&nbsp;Lisa Garcia,&nbsp;LeeAnn Huang,&nbsp;Breanna Carrillo Johnson,&nbsp;Shama Joshi,&nbsp;Diana Kalantar,&nbsp;Srinivasan Madhavan,&nbsp;Samantha McDonough,&nbsp;Izzi Niewiadomski,&nbsp;Nathan Nguyen,&nbsp;Hailey Jiyoon Park,&nbsp;Caroline Pechuzal,&nbsp;James Rohde,&nbsp;Roshni Sahu,&nbsp;Meg Scudder,&nbsp;Satvik Sharma,&nbsp;LeeDar Sneor,&nbsp;Jason To,&nbsp;Bradley Vu,&nbsp;Natalie Vuong,&nbsp;Nicole Yokota,&nbsp;Luiza M. T. Aparecido,&nbsp;Holly Forbes,&nbsp;Mark Fricker,&nbsp;Benjamin Blonder","doi":"10.1002/ecy.4436","DOIUrl":"10.1002/ecy.4436","url":null,"abstract":"<p>The dataset contains leaf venation architecture and functional traits for a phylogenetically diverse set of 122 plant species (including ferns, basal angiosperms, monocots, basal eudicots, asterids, and rosids) collected from the living collections of the University of California Botanical Garden at Berkeley (37.87° N, 122.23° W; CA, USA) from February to September 2021. The sampled species originated from all continents, except Antarctica, and are distributed in different growth forms (aquatic, herb, climbing, tree, shrub). The functional dataset comprises 31 traits (mechanical, hydraulic, anatomical, physiological, economical, and chemical) and describes six main leaf functional axes (hydraulic conductance, resistance and resilience to damages caused by drought and herbivory, mechanical support, and construction cost). It also describes how architecture features vary across venation networks. Our trait dataset is suitable for (1) functional and architectural characterization of plant species; (2) identification of venation architecture-function trade-offs; (3) investigation of evolutionary trends in leaf venation networks; and (4) mechanistic modeling of leaf function. Data are made available under the Open Data Commons Attribution License.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4436","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142490404","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
Rhizobial variation, more than plant variation, mediates plant symbiotic and fitness responses to herbicide stress 根瘤菌的变异比植物的变异更能介导植物对除草剂胁迫的共生和适应反应。
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-23 DOI: 10.1002/ecy.4426
Veronica Iriart, Elizabeth M. Rarick, Tia-Lynn Ashman
{"title":"Rhizobial variation, more than plant variation, mediates plant symbiotic and fitness responses to herbicide stress","authors":"Veronica Iriart,&nbsp;Elizabeth M. Rarick,&nbsp;Tia-Lynn Ashman","doi":"10.1002/ecy.4426","DOIUrl":"10.1002/ecy.4426","url":null,"abstract":"<p>Symbiotic mutualisms provide critical ecosystem services throughout the world. Anthropogenic stressors, however, may disrupt mutualistic interactions and impact ecosystem health. The plant-rhizobia symbiosis promotes plant growth and contributes to the nitrogen (N) cycle. While off-target herbicide exposure is recognized as a significant stressor impacting wild plants, we lack knowledge about how it affects the symbiotic relationship between plants and rhizobia. Moreover, we do not know whether the impact of herbicide exposure on symbiotic traits or plant fitness might be ameliorated by plant or rhizobial genetic variation. To address these gaps, we conducted a greenhouse study where we grew 17 full-sibling genetic families of red clover (<i>Trifolium pratense</i>) either alone (uninoculated) or in symbiosis with one of two genetic strains of rhizobia (<i>Rhizobium leguminosarum</i>) and exposed them to a concentration of the herbicide dicamba that simulated “drift” (i.e., off-target atmospheric movement) or a control solution. We recorded responses in immediate vegetative injury, key features of the plant-rhizobia mutualism (nodule number, nodule size, and N fixation), mutualism outcomes, and plant fitness (biomass). In general, we found that rhizobial variation more than plant variation determined outcomes of mutualism and plant fitness in response to herbicide exposure. Herbicide damage response depended on plant family, but also whether plants were inoculated with rhizobia and if so, with which strain. Rhizobial strain variation determined nodule number and size, but this was herbicide treatment-dependent. In contrast, strain and herbicide treatment independently impacted symbiotic N fixation. And while herbicide exposure significantly reduced plant fitness, this effect depended on inoculation state. Furthermore, the differential fitness benefits that the two rhizobial strains provided plants seemed to diminish under herbicidal conditions. Altogether, these findings suggest that exposure to low levels of herbicide impact key components of the plant-rhizobia mutualism as well as plant fitness, but genetic variation in the partners determines the magnitude and/or direction of these effects. In particular, our results highlight a strong role of rhizobial strain identity in driving both symbiotic and plant growth responses to herbicide stress.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4426","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142488199","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
Experimental species removal reveals species contributions to positive pollinator-mediated reproductive interactions 实验性物种移除揭示了物种对授粉者介导的积极生殖相互作用的贡献。
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-22 DOI: 10.1002/ecy.4455
Cheng Bi, Øystein H. Opedal, Ting Yang, Erliang Gao, Zhigang Zhao
{"title":"Experimental species removal reveals species contributions to positive pollinator-mediated reproductive interactions","authors":"Cheng Bi,&nbsp;Øystein H. Opedal,&nbsp;Ting Yang,&nbsp;Erliang Gao,&nbsp;Zhigang Zhao","doi":"10.1002/ecy.4455","DOIUrl":"10.1002/ecy.4455","url":null,"abstract":"<p>Pollinator-mediated reproductive interactions among co-flowering plant species provide a canonical example of how biotic factors may contribute to species coexistence, yet we lack understanding of the exact mechanisms. Flowering-dominant and unusually attractive “magnet species” with disproportionate contributions to pollination may play key roles in such reproductive interactions, but their relative roles within the same community have rarely been assessed. We experimentally removed either a flowering-dominant or a highly attractive magnet species and compared effects on visitation frequency, pollinator richness, and seed set of co-flowering plants. Removal of either the flowering-dominant species or the magnet species reduced community-level pollinator visitation. Removal of the magnet species had the most consistent effect, including reduced pollinator visitation and richness, and reduced seed set of most co-flowering plants. These results suggest that the magnet species, which interacts with a wider range of pollinator species than does the dominant species, promotes the visitation and reproductive fitness of most other species. Removal of the flowering-dominant species affected only certain species, perhaps because these plants had floral traits similar to the dominant species. Our results highlight the role of attractive magnet species within a community in structuring reproductive interactions and identify potential mechanisms involved in coexistence facilitated by reproductive interactions.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142488213","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
Icing-related injuries in polar bears (Ursus maritimus) at high latitudes 高纬度地区北极熊(Ursus maritimus)与冰冻有关的伤害。
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-22 DOI: 10.1002/ecy.4435
Kristin L. Laidre, Stephen N. Atkinson
{"title":"Icing-related injuries in polar bears (Ursus maritimus) at high latitudes","authors":"Kristin L. Laidre,&nbsp;Stephen N. Atkinson","doi":"10.1002/ecy.4435","DOIUrl":"10.1002/ecy.4435","url":null,"abstract":"","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142484029","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
Urbanization drives partner switching and loss of mutualism in an ant–plant symbiosis 城市化推动了蚂蚁-植物共生中的伙伴转换和互惠关系的丧失
IF 4.4 2区 环境科学与生态学
Ecology Pub Date : 2024-10-14 DOI: 10.1002/ecy.4449
Elsa Youngsteadt, Sara Guiti Prado, Alexandra Karlyz Duran Aquino, Joel Peña Valdeiglesias, Therany Gonzales Ojeda, Jorge Santiago Garate Quispe
{"title":"Urbanization drives partner switching and loss of mutualism in an ant–plant symbiosis","authors":"Elsa Youngsteadt,&nbsp;Sara Guiti Prado,&nbsp;Alexandra Karlyz Duran Aquino,&nbsp;Joel Peña Valdeiglesias,&nbsp;Therany Gonzales Ojeda,&nbsp;Jorge Santiago Garate Quispe","doi":"10.1002/ecy.4449","DOIUrl":"10.1002/ecy.4449","url":null,"abstract":"<p>Mutualistic interactions between species underpin biodiversity and ecosystem function, but may be lost when partners respond differently to abiotic conditions. Except for a few prominent examples, effects of global anthropogenic change on mutualisms are poorly understood. Here we assess the effects of urbanization on a symbiosis in which the plant <i>Cordia nodosa</i> house ants in hollow structures (domatia) in exchange for defense against herbivores. We expected to find that mutualist ants would be replaced in the city by heat-tolerant opportunists, leaving urban plants vulnerable to herbivory. In five protected forest sites and five urban forest fragments in southeast Perú, we recorded the identity and heat tolerance (CT<sub>max</sub>) of ant residents of <i>C. nodosa</i>. We also assayed their plant-defensive behaviors and their effects on herbivory. We characterized the urban heat-island effect in ambient temperatures and within domatia. Forest plants housed a consistent ant community dominated by three specialized plant ants, whereas urban plants housed a suite of 10 opportunistic taxa that were, collectively, about 13 times less likely than forest ants to respond defensively to plant disturbance. In the forest, ant exclusion had the expected effect of increasing herbivory, but in urban sites, exclusion reduced herbivory. Despite poor ant defense in urban sites, we detected no difference in total standing herbivory, perhaps because herbivores themselves also declined in the city. Urban sites were warmer than forest sites (daily maxima in urban domatia averaged 1.6°C hotter), and the urban ant community as a whole was slightly more heat tolerant. These results illustrate a case of mutualism loss associated with anthropogenic disturbance. If urbanization is representative of increasing anthropogenic stressors more broadly, we might expect to see destabilization of myrmecophytic mutualisms in forest ecosystems in the future.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"105 11","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4449","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142431266","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
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