Michael W. Belitz, Asia Sawyer, Lillian Hendrick, Robert P. Guralnick
{"title":"Temperature niche and body size condition phenological responses of moths to urbanization in a subtropical city","authors":"Michael W. Belitz, Asia Sawyer, Lillian Hendrick, Robert P. Guralnick","doi":"10.1002/ecy.4489","DOIUrl":"10.1002/ecy.4489","url":null,"abstract":"<p>Urbanization in temperate climates often advances the beginning and peak of biological events due to multiple factors, especially urban heat islands. However, the effect of urbanization on insect phenology remains understudied in more tropical areas, where temperature may be a weaker phenological cue. We surveyed moths across an urban gradient in a subtropical city weekly for a year to test how impervious surface and canopy cover impact phenology at the caterpillar and adult life stages. For macro-moths, we also examine how these effects vary with life history traits. When pooling all individuals, we found no effect of urbanization proxy variables on timing of caterpillar or adult phenology. At the species-specific level, we found timing of peak adult macro-moths is influenced by canopy cover, which also interacts with two traits: temperature niche and body size. Cold-adapted species delay timing of peak abundance in more shaded sites, while warm-adapted species were not affected. Smaller species, associated with lower dispersal ability, were more phenologically sensitive to canopy cover than larger bodied species. These results highlight the importance of canopy cover within cities and its interaction with species' traits in mediating impact of urbanization on moth phenology in subtropical systems.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4489","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760179","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}
{"title":"Dominant species stabilize pollination services through response diversity, but not cross-scale redundancy","authors":"Mark A. Genung, Rachael Winfree","doi":"10.1002/ecy.4481","DOIUrl":"10.1002/ecy.4481","url":null,"abstract":"<p>Substantial evidence suggests that biodiversity can stabilize ecosystem function, but how it does this is less clear. In very general terms, the hypothesis is that biodiversity stabilizes function because having more species increases the role of compensatory dynamics, which occur when species in a community show different responses to the environment. Here, we focus on two forms of compensatory dynamics, cross-scale redundancy (CSR) and response diversity (RD). CSR occurs when species respond to a disturbance at different scales such that scale-specific disturbances do not negatively affect all species. RD occurs when species contributing to the same function show different responses to an environmental change. We developed a new analytical approach that can compare the strength of CSR and RD in the same dataset and used it to study native bee pollination of blueberry at 16 farms that varied in surrounding agricultural land use. We then asked whether CSR and RD among bee species are associated with the stability of blueberry pollination. Although CSR and RD were both present, only RD was associated with higher stability of pollination. Furthermore, the effects of RD on stability were due to a single widespread species, <i>Andrena bradleyi</i>, that is a specialist on blueberry and, unlike other bee species, was highly abundant at farms surrounded by intensive blueberry agriculture. Thus, the stabilizing effect we observed was attributable to an “identity effect” more than to species richness per se. Our results demonstrate how CSR and RD can be empirically measured and compared and highlight how the theoretical expectations of the biodiversity–ecosystem functioning field are not always upheld when confronted with real-world data.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142752519","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}
{"title":"Cannibalism in northern giant petrels (Macronectes halli) at Possession Island, Southern Indian Ocean","authors":"Alexandre Vong, Karine Delord, Nicolas Croizé, Célia Lesage, Lucía Llorente Zubiri, Florent Sabatier, Christophe Barbraud","doi":"10.1002/ecy.4491","DOIUrl":"10.1002/ecy.4491","url":null,"abstract":"<p>In the Southern Ocean, giant petrels <i>Macronectes</i> sp. are alongside the Brown Skua (<i>Stercorarius antarcticus lonnbergi</i>) the major terrestrial scavengers and predators feeding on land on penguins and seal carrion, and at sea on dead cetaceans and other prey such as crustaceans and fishes (Ridoux, <span>1994</span>). Originally regarded as a single species, Bourne and Warham (<span>1966</span>) described two different species on the basis of differences in both morphology (i.e., the color of the endplate of the bill) and behavior (i.e., the breeding timing): the Northern Giant Petrel with a dark red bill tip and a breeding season starting earlier (<i>Macronectes halli</i>, hereafter northern petrel) and the Southern Giant Petrel with a pale green bill tip (<i>Macronectes giganteus</i>, hereafter southern petrel). Despite these slight differences, both species show remarkable similarities such as their feeding behavior (González-Solís et al., <span>2000</span>). On land, giant petrels are mainly scavengers (Ridoux, <span>1994</span>) but are also fierce predators attacking various prey such as fur seal pups, penguin, and albatross chicks and even adults (Dilley et al., <span>2013</span>; Horswill et al., <span>2014</span>; Nagel et al., <span>2022</span>; Risi et al., <span>2021</span>; Ryan et al., <span>2008</span>). Such an opportunistic feeding repertoire, from scavenging to predation, seems particularly conducive to cannibalism, that is the act of killing and consuming a conspecific (Fouilloux et al., <span>2019</span>), which is an even more likely behavior for a colonial species that breeds in loose aggregations (Voisin, <span>1988</span>). Recently, Grohmann Finger et al. (<span>2021</span>) reported the first case of cannibalism in southern petrels with direct predation of chicks at the South Shetland Islands. It seems then highly probable that northern petrels demonstrate a similar cannibalistic behavior. However, no other observation can be found in the literature, and there is no record of this behavior for northern petrels.</p><p>Possession Island (46°25′ S, 51°45′ E, 146 km<sup>2</sup>) is a sub-Antarctic island located in the Crozet archipelago in the Southern Indian Ocean. Giant petrels form in loose colonies located all around the island and breed on relatively flat areas with tussock or against rocky ridges (Voisin, <span>1988</span>). Based on the last population census, there exist ~220 pairs of southern petrels and ~490 pairs of northern petrels on the island (Delord et al., <span>2008</span>; CEBC-CNRS, Project 109, IPEV, unpublished data). The valley of Petit Caporal (46°21.5′ S, 51°46.2′ E) hosts one of the smallest colonies in the north of the island, with less than 30 breeding pairs of northern petrels per year. The first instance of presumed cannibalism in northern petrels was observed during the annual long-term monitoring of the breeding pairs on 3 December 2021. We recorded the presence of two adult nort","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11736339/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142752464","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}
{"title":"Abrupt demographic change affects projected population size: Implications for an endangered species in a protected area","authors":"Karen B. Strier, Anthony R. Ives","doi":"10.1002/ecy.4487","DOIUrl":"10.1002/ecy.4487","url":null,"abstract":"<p>Understanding how demographic parameters change with density is essential for predicting the resilience of small populations. We use long-term, individual-based life history data from an isolated population of the Critically Endangered Northern Muriqui (<i>Brachyteles hypoxanthus</i>) inhabiting a 1000-ha protected forest to evaluate density-dependent demographic rates before and after an abrupt population decline. We found no effect of density on fertility or birth sex ratio, but mortality rates increased linearly with log density over the 33 years of population growth (1983–2015) and the subsequent 7 years of population decline (2016–2022). We used an age- and sex-structured logistic growth model to project population sizes to 2060. Under the 1983–2015 demographic profile, the projected size was 500 individuals, but this dropped to 200 when including the abrupt change. Although the abrupt decline coincided with the end of a 2-year drought and a yellow fever outbreak, we found no statistical effects of climate or disease on the continued population decline after 2016. However, the lower projected carrying capacity for muriquis is consistent with reduced forest productivity and increased predator pressures. These findings demonstrate the value of long-term monitoring for identifying demographic changes that affect the sustainability of wildlife populations in small protected areas.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4487","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142752455","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}
Eric C. Yip, Mark C. Mescher, Consuelo M. De Moraes, John F. Tooker
{"title":"An insect pheromone primes tolerance of herbivory in goldenrod plants","authors":"Eric C. Yip, Mark C. Mescher, Consuelo M. De Moraes, John F. Tooker","doi":"10.1002/ecy.4486","DOIUrl":"10.1002/ecy.4486","url":null,"abstract":"<p>Environmental cues that predict increased risk of herbivory can prime plant defenses; however, few studies have explored how such cues elicit broader plant responses, including potential effects on plant growth and other resource allocations that may affect tolerance to herbivore damage. We exposed goldenrod plants (<i>Solidago altissima</i>) to varying concentrations of the putative sex pheromone of a gall-inducing herbivore, which has previously been implicated in defense priming. In experiments with two plant genotypes and three herbivore populations, any level of exposure to the pheromone enhanced tolerance of galling, rescuing flower production to levels observed for ungalled plants. Exposure to low doses of the pheromone elicited greater resistance to galling than exposure to high doses, with unexposed plants exhibiting intermediate resistance, suggesting a nonlinear relationship between exposure and defense priming. These findings suggest plant responses to environmental cues associated with biotic stressors are broader and more complex than previously appreciated.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4486","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142752463","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}
Jason E. Donaldson, T. Michael Anderson, Norbert Munuo, Ricardo M. Holdo
{"title":"Time since fire interacts with herbivore intake rates to control herbivore habitat occupancy","authors":"Jason E. Donaldson, T. Michael Anderson, Norbert Munuo, Ricardo M. Holdo","doi":"10.1002/ecy.4473","DOIUrl":"10.1002/ecy.4473","url":null,"abstract":"<p>Smaller grazers consistently show greater preference for recently burned patches than larger species. Energy optimization theory posits that this pattern is driven by small- versus large-bodied herbivores seeking to maximize energy intake by choosing high-quality recently burned grasses, or high-quantity unburned grasses, respectively. We propose that if burn preference is driven by an energy-maximization mechanism, then preference should change over time as grass regrows and progresses across the optimal feeding heights of herbivores of increasing body size. To test this, we used a camera trap array in the Serengeti National Park to quantify changes in the relative preference for burned patches of seven ruminant herbivore species. We compared observed patterns to simulation results from a grass production-herbivore patch selection model. Burn preference and herbivore body size scaled negatively for 6 months after fire, but this relationship disappeared after 7 months when smaller species stopped selecting burns, and larger herbivores selected burns after 10 months, in a reversal of classic grazer succession. Simulations recreated the former but not the latter relationship, suggesting that an energy-maximization mechanism can drive allometric scaling of burn preference immediately after fire, but over longer periods, grazer-driven feedbacks are required to explain large herbivore burn preferences.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4473","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142752520","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}
{"title":"Endangered Black-faced Spoonbills alter migration across the Yellow Sea due to offshore wind farms","authors":"Yi-Chien Lai, Chi-Yeung Choi, Kisup Lee, In-Ki Kwon, Chia-Hsiang Lin, Luke Gibson, Wei-Yea Chen","doi":"10.1002/ecy.4485","DOIUrl":"10.1002/ecy.4485","url":null,"abstract":"<p>The Black-faced Spoonbill (<i>Platalea minor</i>), an endangered and flagship species inhabiting coastal wetlands along the East Asian-Australasian Flyway (BirdLife International, <span>2017</span>; Cultural Heritage Administration, <span>2020</span>), migrates annually between its primary breeding grounds on the west coast of the Korean Peninsula (Kang et al., <span>2016</span>) and its wintering grounds, predominantly Japan, Chinese mainland, Hong Kong, Taiwan, and Vietnam (Yu et al., <span>2023</span>). The Yellow Sea crossing, averaging 14.1 h (Appendix S1: Table S1), is perhaps the most challenging part of their migration. The southwest coast of the Yellow Sea, crucial for migratory birds, hosts the world's largest concentration of operational offshore wind farms. In 2021, driven by the government's year-end deadline for receiving subsidies for offshore wind energy generation, a surge in installations occurred in China. The surge resulted in China possessing nearly half of the world's total offshore wind energy capacity (Global Wind Energy Council, <span>2023</span>). While the barrier effect, which impedes the natural movement of wildlife, caused by individual offshore wind farms is generally considered marginal for nonmarine bird species compared with seabirds (Fox et al., <span>2006</span>; Masden et al., <span>2009</span>; Masden et al., <span>2010</span>; Pettersson, <span>2005</span>), the cumulative effects of multiple wind farms may be substantial. Here, we report two cases of GPS-cellular tracked Black-faced Spoonbills altering their migration routes during the Yellow Sea crossing after encountering successive offshore wind farms.</p><p>In the first case, M03, a male in its hatching year, departed South Korea on its first southward migration at dawn on 2021-11-07 (Video S1). After covering a distance of 502.0 km in 10.5 h, it was 65.9 km off the Rudong coast, one of the most important stopover sites for Spoon-billed Sandpiper in Jiangsu, China (Peng et al., <span>2017</span>; Yang et al., <span>2020</span>), when it sequentially entered two offshore wind farms (Figure 1a). M03 flew mainly at the height of the blade rotation zone (see details in Appendix S1). After passing through the two wind farms, it altered its direction and headed north. After dusk, M03 encountered a third wind farm, where it spent 1.0 h circling before departing and reversing its path back to South Korea. It then flew a distance of 376.8 km, landing in the middle of the night on 2021-11-08 on the rocky shore of Hatae Island, around 110 km west of the Korean Peninsula. Notably, this trip recorded the second longest continuous flight among all the other 38 Yellow Sea crossing tracks collected in the study, with a duration of 21.9 h (Appendix S1: Table S1). The bird remained stationary for 29.5 h, indicating possible exhaustion, before resuming its journey toward Haenam County at the southern tip of the Korean Peninsula. Following its return, M03 mainly stayed ","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11733854/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142741778","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}
Jiang Wang, Song Gao, Hefang Hong, Wei Xue, Jiwei Yuan, Xiao-Yan Wang, Mark van Kleunen, Junmin Li
{"title":"Herbivory and allelopathy contribute jointly to the diversity–invasibility relationship","authors":"Jiang Wang, Song Gao, Hefang Hong, Wei Xue, Jiwei Yuan, Xiao-Yan Wang, Mark van Kleunen, Junmin Li","doi":"10.1002/ecy.4490","DOIUrl":"10.1002/ecy.4490","url":null,"abstract":"<p>Although herbivory and allelopathy play important roles in plant invasions, their roles in mediating the effect of plant diversity on invasion resistance remain unknown. In a 2-year field experiment, we constructed native plant communities with four levels of species richness (one, two, four, and eight species) and used a factorial combination of insecticide and activated carbon applications to reduce herbivory and allelopathy, respectively. We then invaded the communities with the introduced plant <i>Solidago canadensis</i> L. One year after the start of the experiment, there was no statistically significant net effect of species richness on biomass of the invader. However, a structural equation model showed that species richness had a positive direct effect on invader biomass that was partially balanced out by a negative indirect effect of species richness via increased light interception. In the second year, the relationship between invader biomass and species richness was negative when we analyzed the treatment combination with herbivory and allelopathy separately. Therefore, we conclude that joint effects of herbivory and allelopathy may play major roles in driving the diversity–invasibility relationship and should be considered in future studies.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142741783","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}
{"title":"Energy transfer efficiency rather than productivity determines the strength of aquatic trophic cascades","authors":"Libin Zhou, Mingyu Luo, Pubin Hong, Shawn Leroux, Feizhou Chen, Shaopeng Wang","doi":"10.1002/ecy.4482","DOIUrl":"10.1002/ecy.4482","url":null,"abstract":"<p>Trophic cascades are important determinants of food web dynamics and functioning, yet mechanisms accounting for variation in trophic cascade strength remain elusive. Here, we used food chain models and a mesocosm experiment (phytoplankton–zooplankton–shrimp) to disentangle the relative importance of two energetic processes driving trophic cascades: primary productivity and energy transfer efficiency. Food chain models predicted that the strength of trophic cascades was increased as the energy transfer efficiency between herbivore and predator (predator efficiency) increased, while its relationship with primary productivity was relatively weak. These model predictions were confirmed by a mesocosm experiment, which showed that the strength of trophic cascade increased with predator efficiency but remained unaffected by nutrient supply rate or primary productivity. Combined, our results indicate that the efficiency of energy transfer along the food chain, rather than the total amount of energy fixed by primary producers, determines the strength of trophic cascades. Our study provides an integrative perspective to reconcile energetic and population dynamics in food webs, which has implications for both ecological research and ecosystem management.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142741781","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}
{"title":"Eco-phenotypic feedback loops differ in multistressor environments","authors":"Lynn Govaert, Toni Klauschies","doi":"10.1002/ecy.4480","DOIUrl":"10.1002/ecy.4480","url":null,"abstract":"<p>Natural communities are exposed to multiple environmental stressors, which simultaneously impact the population and trait dynamics of the species embedded within these communities. Given that certain traits, such as body size, are known to rapidly respond to environmental change, and given that they can strongly influence the density of populations, this raises the question of whether the strength of the eco-phenotypic feedback loop depends on the environment, and whether stressful environments would enhance or disrupt this feedback or causal linkage. We use two competing freshwater ciliates—<i>Colpidium striatum</i> and <i>Paramecium aurelia</i>—and expose their populations to a full-factorial design of increasing salinity and temperature conditions as well as interspecific competition. We found that salinity, temperature, and competition significantly affected the density and cell size dynamics of both species. Cell size dynamics strongly influenced density dynamics; however, the strength of this eco-phenotypic feedback loop weakened in stressful conditions and with interspecific competition. Our study highlights the importance of studying eco-phenotypic dynamics in different environments comprising stressful abiotic conditions and species interactions.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.4480","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142718173","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}