IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-06-19 DOI: 10.1016/j.fooweb.2025.e00408

Erdem Danyer , Uğur Özsandıkçı , Anil Soyumert

引用次数: 0

Assessing muskrat predation on a freshwater mussel assemblage in a southeastern United States river 评估麝鼠对美国东南部河流淡水贻贝群的捕食

IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-06-18 DOI: 10.1016/j.fooweb.2025.e00407

Brileigh V. Hicks , Augustin C. Engman , Jeronimo G. Da Silva Neto , Caitlin S. Carey , Julianna J. Jett , Gerald R. Dinkins

{"title":"Assessing muskrat predation on a freshwater mussel assemblage in a southeastern United States river","authors":"Brileigh V. Hicks , Augustin C. Engman , Jeronimo G. Da Silva Neto , Caitlin S. Carey , Julianna J. Jett , Gerald R. Dinkins","doi":"10.1016/j.fooweb.2025.e00407","DOIUrl":"10.1016/j.fooweb.2025.e00407","url":null,"abstract":"<div><div>Many freshwater mussel species are experiencing significant declines across the United States, particularly in the Southeast where most of the diversity in this animal group occurs. In this study, we evaluated the impact of muskrat (<em>Ondatra zibethicus</em>) predation on the mussel assemblage at Kyles Ford, a well-studied reach of the Clinch River, Tennessee. We compared quantitative estimates of abundance and size structure of live populations with shells that accumulated in muskrat middens between September and December 2023. We used a sampling approach that censused all shells deposited by muskrats at this site during the study and allowed us to quantify predation rates and size-and species-selectivity of muskrat predation. In total, we documented the predation of 2370 individual mussels of 26 species, including 14 federally listed species and one candidate species. The mean predation rate was 20 mussels per day, and muskrats exhibited preference for larger individuals. The Chesson's index confirmed significant species selectivity coinciding with endangered species and size-selectivity was observed in four species. These findings underscore the need for further research into the seasonal and environmental variability of muskrat predation and its long-term effects on mussel populations. Additionally, our results suggest that muskrat middens may serve as a valuable tool for monitoring mussel species occurrences.</div></div>","PeriodicalId":38084,"journal":{"name":"Food Webs","volume":"44 ","pages":"Article e00407"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144364471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Predation and prey preference of the land snail Gulella bicolor - implication for land snail regulation 双色地螺的捕食和捕食偏好——对地螺调控的启示

IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-06-18 DOI: 10.1016/j.fooweb.2025.e00409

Gargi Nandy, Gautam Aditya

{"title":"Predation and prey preference of the land snail Gulella bicolor - implication for land snail regulation","authors":"Gargi Nandy, Gautam Aditya","doi":"10.1016/j.fooweb.2025.e00409","DOIUrl":"10.1016/j.fooweb.2025.e00409","url":null,"abstract":"<div><div>The predation and the prey preference of the land snail <em>Gulella bicolor</em> (Hutton, 1834) (Gastropda: Streptaxidae) against coexisting land snails, <em>Allopeas gracile</em> (Hutton, 1834 (Gastropoda: Achatinidae), <em>Succinea daucina</em> (L. Pfeiffer, 1854) (Gastropoda: Succineidae) and <em>Glessula gemma</em> (Reeve, 1850) (Gastropoda: Achatinidae) were evaluated. The prey size class, prey density and predator density were considered as the explanatory variable to evaluate the predation pattern and the prey selectivity of <em>G. bicolor.</em> For snail species <em>A. gracile</em> and <em>S. daucina</em>, the predation pattern varied significantly as a function of prey size classes, prey density and predator density but not for <em>G. gemma</em>. The prey selectivity suggested that for selected size classes, the preference was inclined towards <em>A. gracile</em>, when <em>G. gemma</em> or <em>S. daucina</em> were present as alternative prey. However, when <em>S. daucina</em> and <em>G. gemma</em> were present together, the significant preference was observed. As a consequence, the potential apparent competition web (PAC) of the interactions of the predatory snail <em>G. bicolour</em> and the prey snails, <em>A. gracile, G. gemma</em> and <em>S. daucina</em> was calculated. Although, the predatory snail <em>G. bicolour</em> can be promoted as a biocontrol agent, the successful regulation may vary with the size and density of the prey snails and the extent of the PAC.</div></div>","PeriodicalId":38084,"journal":{"name":"Food Webs","volume":"44 ","pages":"Article e00409"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Predatory behavior of the hellgrammite larva Corydalus batesii (McLachlan, 1868) (Insecta: Megaloptera: Corydalidae) in an Amazonian stream 亚马逊河流域河蠹蛾幼虫（昆虫目：大翅目：河蠹科）的捕食行为

IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-06-18 DOI: 10.1016/j.fooweb.2025.e00410

Eduarda Silva de Lima , Iluany da Silva Costa , Thaís Santos Souza , Emilly Vieira Drosdosky , Matheus Fernandes-Freitas , Karina Dias-Silva

{"title":"Predatory behavior of the hellgrammite larva Corydalus batesii (McLachlan, 1868) (Insecta: Megaloptera: Corydalidae) in an Amazonian stream","authors":"Eduarda Silva de Lima , Iluany da Silva Costa , Thaís Santos Souza , Emilly Vieira Drosdosky , Matheus Fernandes-Freitas , Karina Dias-Silva","doi":"10.1016/j.fooweb.2025.e00410","DOIUrl":"10.1016/j.fooweb.2025.e00410","url":null,"abstract":"<div><div>Prey selection by aquatic predators is influenced by active choice, prey vulnerability and encounter rate. Megaloptera is an order of predatory aquatic insects whose larvae feed exclusively on live prey. Their larvae are found in Amazonian streams, but their biology, distribution and diet have been little studied. Here, an event of Tipulidae predation by <em>Corydalus batesii</em> (McLachlan, 1868) was recorded in a conserved stream in Medicilândia, Pará. This species had not been recorded in the state for 26 years, and this is the first time that the feeding of this larva has been evaluated. The study adds gaps in the behavior and distribution of this species, adding to knowledge about trophic interactions in Amazonian streams and also reinforcing the importance of conserving these ecosystems. The urgency for habitat conservation is highlighted by the fact that the stream evaluated was deforested and impacted weeks after collection.</div></div>","PeriodicalId":38084,"journal":{"name":"Food Webs","volume":"44 ","pages":"Article e00410"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Drinking to the last drop! Record of honeydew consumption by a ghost spider (Araneae: Anyphaenidae) in an urban environment in southeastern Brazil 喝到最后一滴！巴西东南部城市环境中一只鬼蛛（蜘蛛目：鬼蛛科）吸食蜜露的记录

IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-06-18 DOI: 10.1016/j.fooweb.2025.e00406

Glauco C.S. Oliveira , Guilherme R. Demetrio , Gabriel C. Jacques , Igor H. Silva , Marcos M. Souza , Antonio D. Brescovit

引用次数: 0

Spatio-temporal distribution, diet and human conflict of snow leopard (Panthera uncia) in the Khunjerab National Park, Gilgit Baltistan 吉尔吉特-巴尔蒂斯坦红其拉甫国家公园雪豹的时空分布、饮食与人类冲突

IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-06-01 DOI: 10.1016/j.fooweb.2025.e00402

Saira Akber , Tariq Mahmood , Tahir Mehmood , Amjad Rashid Kayani , Muhammad Sajid Nadeem , Faraz Akrim

{"title":"Spatio-temporal distribution, diet and human conflict of snow leopard (Panthera uncia) in the Khunjerab National Park, Gilgit Baltistan","authors":"Saira Akber , Tariq Mahmood , Tahir Mehmood , Amjad Rashid Kayani , Muhammad Sajid Nadeem , Faraz Akrim","doi":"10.1016/j.fooweb.2025.e00402","DOIUrl":"10.1016/j.fooweb.2025.e00402","url":null,"abstract":"<div><div>Apex predators play a critical role in ecosystem dynamics, exerting top-down control over prey populations and influencing biodiversity. The current study focused on the distribution, diet menu and human conflict of Snow leopard <em>(Panthera uncia</em>), one of the apex predators in the Khunjerab National Park (KNP), Gilgit-Baltistan. We used camera trapping as well as field survey techniques for determining the distribution of the species in the study area. The diet of snow leopard was investigated through scat analysis while human conflict was investigated through self-designed questionnaires. Results showed that snow leopards are distributed in different areas of the park at various elevations ranging between 3075 m(lowest) and 6293 m (highest). The camera traps captured a total of 20 capture “events or encounters” of snow leopard, among overall 550 photographs taken at various sites. Analysis of these capture data revealed that the activity pattern of snow leopard was bimodal, and it showed peak activity during dawn and dusk times. Scat analysis revealed that snow leopards take 72 % of their diet from wild prey, of which Himalayan Ibex makes up a large portion, and the remaining 28 % from the domestic prey, of which Yak is consumed at a high rate. Questionnaire data analysis revealed that depredation by snow leopard on livestock mostly occurs in the valley locations (88.5 %), with grazing areas accounting for 11.4 % of the total. The attacks occur mostly at night, and in the months of May and June, respectively, In the KNP, apex predators attack yaks by 82.2 %; while depredation rates for sheep, goats, and cows were 8.3 %, 6.25 %, and 3.12 %, respectively. The study concludes that depredation on livestock is the main cause of conflict between humans and the snow leopard in the study area, and it is the biggest challenge for conservationists.</div></div>","PeriodicalId":38084,"journal":{"name":"Food Webs","volume":"43 ","pages":"Article e00402"},"PeriodicalIF":1.8,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144184916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

American shorebird-prey network patterns: Geographic variation in non-breeding habitats 美国滨鸟捕食网络模式：非繁殖栖息地的地理变异

IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-04-30 DOI: 10.1016/j.fooweb.2025.e00401

Jenny A. Angarita-Báez, Henrique C. Delfino, Caio J. Carlos

{"title":"American shorebird-prey network patterns: Geographic variation in non-breeding habitats","authors":"Jenny A. Angarita-Báez, Henrique C. Delfino, Caio J. Carlos","doi":"10.1016/j.fooweb.2025.e00401","DOIUrl":"10.1016/j.fooweb.2025.e00401","url":null,"abstract":"<div><div>Understanding trophic ecology is essential for elucidating species' life histories and the ecological interactions that sustain them. For migratory shorebirds, which are opportunistic feeders, survival across vast migratory routes depends on the availability of critical stopover sites, where local environmental conditions shape food resources. In this study, we applied a network-based approach to examine shorebird-prey interactions across the Americas, constructing an interaction matrix from a systematic literature review spanning publications from 1929 to the present. Our analysis, encompassing the diets of 36 migratory shorebird species across distinct biogeographic realms, revealed that shorebird-prey networks exhibit low nestedness, low connectance, and moderate modularity. These structural patterns suggest a balance between vulnerability to prey decline and potential resilience through reduced competition and disease transmission. Network structure varied more in tropical regions than in temperate zones. Contrary to our hypothesis, prey richness did not correlate with increased morphological specialization among shorebirds. This suggests that factors beyond morphology, such as behavioral plasticity or interspecific competition, may play a greater role in shaping foraging strategies. This research provides the first comprehensive analysis of structural patterns in antagonistic shorebird-prey networks across the Americas. While the observed modularity suggests some resilience during migration, climate change and anthropogenic pressures pose significant threats. Continued research into shorebird diets is imperative for informing conservation and management strategies at key stopover sites.</div></div>","PeriodicalId":38084,"journal":{"name":"Food Webs","volume":"43 ","pages":"Article e00401"},"PeriodicalIF":1.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

A global citizen science effort via iNaturalist reveals food webs of large predatory rove beetles 一项由iNaturalist发起的全球公民科学努力揭示了大型掠食性漫游者甲虫的食物网

IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-04-19 DOI: 10.1016/j.fooweb.2025.e00399

Fang-Shuo Hu , Yun Hsiao , Alexey Solodovnikov

{"title":"A global citizen science effort via iNaturalist reveals food webs of large predatory rove beetles","authors":"Fang-Shuo Hu , Yun Hsiao , Alexey Solodovnikov","doi":"10.1016/j.fooweb.2025.e00399","DOIUrl":"10.1016/j.fooweb.2025.e00399","url":null,"abstract":"<div><div>The behavior of organisms is very difficult to observe and document, especially direct interactions such as predation. As a result, there are few systematic studies of such phenomena on a large scale and the food webs of organisms that are formed by fleeting and opportunistic interactions are largely unknown. Understanding food webs is essential for addressing the Eltonian shortfall in biodiversity knowledge and revealing ecosystem dynamics. The rise of citizen science in recent years offers unique opportunities to study food webs on a global scale, which has been demonstrated for larger animals but not for small ones like insects. Here we explore the potential of iNaturalist as a cost-effective citizen science platform to obtain data about the prey choices of predatory rove beetles (family Staphylinidae) from the subtribe Staphylinina, as an alternative to traditional, labor-intense laboratory studies. We manually mined the dietary evidence of Staphylinina worldwide through over 48,000 observations on iNaturalist and 159 records of predation were found. Our findings show that citizen science data not only supports the published studies, but also provides direct and novel field-based evidence of rove beetle prey specialization with numbers of observations that exceed the amount of previously available data by an order of magnitude. We confirmed that some Staphylinina are generalist predators and discovered that some genera and species exhibit specific prey preferences, as documented by iNaturalist. This approach demonstrates that citizen science platforms offer an innovative, scalable, and cost-effective solution to filling global biodiversity knowledge gaps.</div></div>","PeriodicalId":38084,"journal":{"name":"Food Webs","volume":"43 ","pages":"Article e00399"},"PeriodicalIF":1.8,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Insights into prey handling and feeding strategies by ghost crabs on sea turtle eggs and hatchlings 鬼蟹对海龟卵和幼崽的捕食和喂养策略的见解

IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-04-16 DOI: 10.1016/j.fooweb.2025.e00400

Casper Avenant

引用次数: 0

Intraguild predation by a biocontrol predator is reduced at lower temperatures 在较低温度下，一种生物控制捕食者对动物群内的捕食会减少

IF 1.8 4区环境科学与生态学

Food Webs Pub Date : 2025-04-03 DOI: 10.1016/j.fooweb.2025.e00397

Arina Martin , Stella F. Uiterwaal

{"title":"Intraguild predation by a biocontrol predator is reduced at lower temperatures","authors":"Arina Martin , Stella F. Uiterwaal","doi":"10.1016/j.fooweb.2025.e00397","DOIUrl":"10.1016/j.fooweb.2025.e00397","url":null,"abstract":"<div><div>Generalist predators play important roles in ecosystems by consuming various prey types. Despite this, predation studies often focus on a predator's most consumed prey, with limited attention given to predation on less common prey. In addition, despite increased temperature variability under climate change, it is unclear how predator foraging is affected by colder temperatures. Here, we examine the functional response of the generalist wolf spider <em>Hogna baltimoriana</em> on <em>Hippodamia convergens</em> ladybeetle larvae at an ambient and two colder temperatures. In agroecosystems, both wolf spiders and ladybeetles can act as biocontrol predators of pest species and may engage in intraguild predation, yet ladybeetles appear to be uncommon in wild wolf spiders' diets. We provide evidence of intraguild predation by <em>H. baltimoriana</em> on <em>H. convergens</em> across cold temperatures but find that the likelihood of this spider foraging on <em>H. convergens</em> larvae is reduced at lower temperatures and with a lower larva density. We further show that colder temperatures reduce space clearance rate, resulting in decreased foraging rates at low prey densities. Our results have important implications for biocontrol programs and our understanding of predator-prey interactions under climate change, and we highlight the need for functional responses to be evaluated on less commonly consumed prey.</div></div>","PeriodicalId":38084,"journal":{"name":"Food Webs","volume":"43 ","pages":"Article e00397"},"PeriodicalIF":1.8,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

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