Austral Ecology最新文献

筛选
英文 中文
Conspecific Negative Distance-Dependence and New Zealand Podocarp Forest Dynamics 同种负距离依赖与新西兰袋鲤森林动态
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-09-15 DOI: 10.1111/aec.70291
Christopher H. Lusk, Craig J. MacDonell, Selwyn R. June
{"title":"Conspecific Negative Distance-Dependence and New Zealand Podocarp Forest Dynamics","authors":"Christopher H. Lusk,&nbsp;Craig J. MacDonell,&nbsp;Selwyn R. June","doi":"10.1111/aec.70291","DOIUrl":"https://doi.org/10.1111/aec.70291","url":null,"abstract":"<p>The Janzen-Connell hypothesis proposed that conspecific negative density or distance dependence (CNDDD) helps maintain the species richness of tropical rainforests through the action of specialist natural enemies that suppress conspecific recruitment beneath canopy trees. Empirical studies have since shown that CNDDD occurs not only in tropical rainforests but in a wide range of other vegetation types. Studies of CNDDD have invariably focused on its implications for species coexistence and diversity; rarely has its potential relevance to successional replacement patterns been explored. Here we present evidence for CNDDD that may shed new light on a long-standing problem in New Zealand forest dynamics—the failure of relatively shade-tolerant conifers (in particular <i>Dacrydium cupressinum</i>, Podocarpaceae) to regenerate beneath their own canopies in dense podocarp stands. We mapped tree positions on a 3-ha plot in a central North Island podocarp/broadleaf forest in which diameter distributions indicated two discrete cohorts of <i>D. cupressinum</i> trees and used pair-correlation functions to measure hetero- and conspecific spatial associations between small and large trees. Small trees (5–60 cm diameter) of <i>D. cupressinum</i> were significantly negatively associated with large conspecific trees of the older cohort at radii of up to 7 m. This pattern cannot readily be explained by light requirements, as small trees of a less shade-tolerant podocarp (<i>Phyllocladus trichomanoides</i>) were distributed independently of large <i>D. cupressinum</i>. Small trees of the only other species well-represented by large diameters (the broadleaved species <i>Elaeocarpus dentatus</i>, Elaeocarpaceae) were also negatively associated with large conspecific trees, albeit across a narrower range of radii. Our results suggest CNDDD might contribute to the characteristic failure of <i>D. cupressinum</i> to regenerate in central North Island dense podocarp stands, regeneration resuming only when attrition or exogenous disturbance reduces the <i>D. cupressinum</i> overstorey to scattered emergent trees.</p>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.70291","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148994048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Occurrence Records of Brazilian Spirostreptida (Myriapoda: Diplopoda) in the Atlantic Forest Are Biased Towards Proximity to State Highways and Urban Areas 巴西螺链虫(多足目:双足目)在大西洋森林的发生记录偏向于靠近国家公路和城市地区
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-09-11 DOI: 10.1111/aec.70288
Luiz F. M. Iniesta, Rodrigo A. Castro-Souza, Jackson C. Means, Kaloyan Ivanov, Antonio D. Brescovit, Mayara D. Faustino-Magalhães, Rodrigo S. Bouzan
{"title":"Occurrence Records of Brazilian Spirostreptida (Myriapoda: Diplopoda) in the Atlantic Forest Are Biased Towards Proximity to State Highways and Urban Areas","authors":"Luiz F. M. Iniesta,&nbsp;Rodrigo A. Castro-Souza,&nbsp;Jackson C. Means,&nbsp;Kaloyan Ivanov,&nbsp;Antonio D. Brescovit,&nbsp;Mayara D. Faustino-Magalhães,&nbsp;Rodrigo S. Bouzan","doi":"10.1111/aec.70288","DOIUrl":"https://doi.org/10.1111/aec.70288","url":null,"abstract":"<p>Diplopoda is one of the most diverse terrestrial arthropod groups in Brazil, with the order Spirostreptida Brandt, 1833 standing out for its species richness. Most of the ~180 Brazilian Spirostreptida species occur in the Atlantic Forest, primarily along its coastal region. However, knowledge of their distribution patterns and associated sampling biases remains limited. We applied a Bayesian framework to 453 presence-only occurrence records of Spirostreptida from the Atlantic Forest to evaluate predictors of sampling bias affecting species distribution knowledge. Two sets of predictors (low- and high-impact) were analysed jointly to identify areas with strong bias or areas associated with anthropogenic impacts. Geographic projections of sampling rates conditioned on these predictors indicate that the Atlantic Forest encompasses extensive areas with low sampling rates. Our results reveal a dense concentration of occurrence records in the Serra do Mar coastal forests, with the southeastern mountain ranges standing out as the area with the highest density of well-sampled sites across the biome. In contrast, many of the northeastern regions, particularly the Bahia and Pernambuco coastal forests, exhibit low sampling effort. Sampling bias was primarily associated with high-impact predictors, especially proximity to state highways and urban areas. The combined effects of these variables, along with proximity to railroads and protected areas, should be considered when assessing millipede distributions in Brazil and elsewhere, as they invariably would lead to a Wallacean shortfall. Mitigating these biases requires increased survey efforts in poorly accessible and under-sampled regions, especially outside the southeast, digitization and mobilization of data stored in biological collections and investment in the training of new taxonomists.</p>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.70288","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Down the Wombat Hole: Mortality of an Eastern Grey Kangaroo From Apparent Entrapment 袋熊洞下:东部灰袋鼠明显被诱捕致死
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-09-09 DOI: 10.1111/aec.70287
Kelly Forrester
{"title":"Down the Wombat Hole: Mortality of an Eastern Grey Kangaroo From Apparent Entrapment","authors":"Kelly Forrester","doi":"10.1111/aec.70287","DOIUrl":"https://doi.org/10.1111/aec.70287","url":null,"abstract":"<p>Large herbivore mortality is typically attributed to predation, starvation, climatic extremes, or disease and is rarely linked to fine-scale structural disturbances. Here, I report an observation of an adult female eastern grey kangaroo (<i>Macropus giganteus</i>) found dead within the entrance of a bare-nosed wombat (<i>Vombatus ursinus</i>) burrow in southeastern Australia. The carcass was tightly wedged approximately 1 m inside the burrow, with no evidence of predation or trauma. Field observations were consistent with apparent entrapment after the individual entered the burrow and was unable to exit; however, underlying illness, injury, or compromised condition could not be excluded and may have contributed to the mortality event. Although wombat burrows have ecological benefits, this observation highlights their potential to create localised hazards for large herbivores. Given that this was the only observed case among 1360 kangaroos monitored over 15 years, of which 425 individuals were found dead or showed evidence of death, entrapment is likely uncommon but may be underdetected. This case provides a rare observation of apparent entrapment associated with mortality in a female eastern grey kangaroo.</p>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.70287","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
The Impact of Genet Patterns, Seedbank and Fire Dynamics on Population Fate for New Populations of a Highly Clonal Incompatible Plant Species 一种高度无性系不亲和性植物新居群的遗传格局、种子库和火灾动态对种群命运的影响
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-09-09 DOI: 10.1111/aec.70283
D. A. Tierney
{"title":"The Impact of Genet Patterns, Seedbank and Fire Dynamics on Population Fate for New Populations of a Highly Clonal Incompatible Plant Species","authors":"D. A. Tierney","doi":"10.1111/aec.70283","DOIUrl":"https://doi.org/10.1111/aec.70283","url":null,"abstract":"<p>Effective restoration must address a diversity of threats including reduced genet diversity that can be critical to the restoration of plant populations. This study assesses the importance of genet diversity when restoration centres on the creation of new populations of a clonal incompatible plant species. <i>Persoonia hindii</i> P.H.Weston &amp; L.A.S.Johnson is a highly clonal, self-incompatible endangered plant species restricted to 30 populations within a small plateau west of Sydney, NSW, Australia. New populations with 1–10 genets at the population/subpopulation level have been established as an insurance against ongoing loss, but their fate is uncertain. Population modelling was applied to assess the risk of population extirpation beyond common monitoring horizons (over 200 years). A stochastic population model based on over 10 years of field data on population dynamics as well as breeding system and genetic assessments was utilised using the R based Steps platform. Extinction risk, population size and assessments via an applied machine learning algorithm determined genet diversity as well as seed bank dynamics to be key drivers of population fate. Fire dynamics was a lesser driver of population fate. Genet diversity is likely critical to population fate for many threatened clonal incompatible species, yet at the implementation stage restoration works frequently fail to adequately address genet patterns. Whilst genetic rescue is advocated for restoration of extant populations, the creation of new populations likely requires more careful design with respect to a range of factors that contribute to population genetic patterns and viability of these populations.</p>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.70283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Morphological Traits Do Not Explain Interaction Patterns in a Hermit Hummingbird–Plant Network 形态特征不能解释寄居鸟-植物网络的相互作用模式
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-09-04 DOI: 10.1111/aec.70281
Juan C. Diaz-Ricaurte, Geven Rodriguez-Suárez, Alba Marina Torres
{"title":"Morphological Traits Do Not Explain Interaction Patterns in a Hermit Hummingbird–Plant Network","authors":"Juan C. Diaz-Ricaurte,&nbsp;Geven Rodriguez-Suárez,&nbsp;Alba Marina Torres","doi":"10.1111/aec.70281","DOIUrl":"https://doi.org/10.1111/aec.70281","url":null,"abstract":"<div>\u0000 \u0000 <p>Morphological matching between pollinators and flowers is often proposed as a key mechanism structuring plant–pollinator interactions. Hermit hummingbirds (Phaethornithinae) are frequently considered specialized pollinators due to their diversity of bill morphologies and their association with tubular flowers. However, whether these traits actually structure interaction patterns at the community level remains unclear. We investigated hummingbird–plant interactions in a tropical rainforest of the Colombian Pacific by integrating morphometric measurements of hummingbirds and flowers with field observations of floral visitation and pollen load analyses collected between May and November 2011 in the Microcuenca Quebrada Pericos conservation area. Despite pronounced morphological variation among both hummingbirds and plants, interaction frequencies were not related to bill–corolla length or curvature mismatches. Likewise, hummingbird bill traits were not associated with the floral traits of visited plants, and body mass did not explain differences in resource breadth. In contrast, pollen loads revealed additional plant–hummingbird interactions not detected through field observations, indicating that direct observations underestimate the realized interaction network. Overall, hermit hummingbirds interacted with a wide range of floral morphologies, showing substantial overlap in resource use among species. These results indicate that interactions in this community are not structured by strict morphological matching, but instead reflect flexible foraging behaviour and variation in resource availability.</p>\u0000 </div>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942318","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
When Resources Become Limited: Trophic Niches Shift From Generalism to Specialization in Dung Beetles (Coleoptera: Scarabaeinae) 当资源变得有限时:屎壳郎(鞘翅目:金龟子科)的营养生态位从一般向专门化转变
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-09-04 DOI: 10.1111/aec.70286
Leonardo Vilas-Bôas M. P. de Cerqueira, Damián Villaseñor-Amador, César Murilo de Albuquerque Correa
{"title":"When Resources Become Limited: Trophic Niches Shift From Generalism to Specialization in Dung Beetles (Coleoptera: Scarabaeinae)","authors":"Leonardo Vilas-Bôas M. P. de Cerqueira,&nbsp;Damián Villaseñor-Amador,&nbsp;César Murilo de Albuquerque Correa","doi":"10.1111/aec.70286","DOIUrl":"https://doi.org/10.1111/aec.70286","url":null,"abstract":"<p>Resource availability and predictability can shape trophic organization in ecological communities. In livestock pastures, cattle dung represents a highly abundant and predictable trophic subsidy for dung beetles, potentially promoting generalist foraging strategies. Here, we test how cattle exclusion affects trophic organization in dung beetle assemblages in the Brazilian Pantanal. We compared dung beetle richness, abundance, assemblage composition, and trophic classification between cattle-grazed and ungrazed pastures (&lt; 20 years of cattle exclusion) using carrion and cattle dung as bait resources. Species richness and abundance did not differ between bait types in either system. However, dung beetle assemblages differed significantly between carrion and dung baits only in ungrazed pastures. In grazed pastures, assemblages were dominated by trophic generalists, whereas ungrazed pastures showed increased trophic specialization, including shifts of four species from generalist to specialist classifications following cattle exclusion. These findings indicate that predictable trophic subsidies homogenize trophic structure by promoting broad resource use, whereas resource limitation restores trophic differentiation and niche partitioning. Our results demonstrate how changes in resource availability can reorganize trophic interactions in decomposer communities and potentially alter patterns of functional complementarity in ecosystems.</p>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.70286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Pollinator Associations of Rare and Endangered Epacris Species (Ericaceae) in Lutruwita/Tasmania: Implications for Conservation 卢特鲁维塔/塔斯马尼亚岛珍稀濒危叶青科植物传粉者的关联:保护意义
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-09-02 DOI: 10.1111/aec.70285
Karen A. Johnson, Peter B. McQuillan
{"title":"Pollinator Associations of Rare and Endangered Epacris Species (Ericaceae) in Lutruwita/Tasmania: Implications for Conservation","authors":"Karen A. Johnson,&nbsp;Peter B. McQuillan","doi":"10.1111/aec.70285","DOIUrl":"https://doi.org/10.1111/aec.70285","url":null,"abstract":"<p>The breeding systems of Lutruwita/Tasmania's threatened <i>Epacris</i> taxa are poorly known. Our main objective was to determine the pollinators of several endemic species and explore for relationships between pollinators, floral morphology, flowering time and habitat. The <i>Epacris</i> have limited variation in floral traits and exhibit generalist floral visitor profiles. No significant relationships were found between the floral visitor profiles and floral attributes, flowering times or habitats. Visitor exclusion trials in three of the <i>Epacris</i> spp. suggest they may be near obligate out-crossers. In open pollination, up to 30% of capsules had numerous viable seeds. No <i>Epacris</i> were exclusively bee-, fly- or butterfly-pollinated and for each species, pollen was dispersed by more than one functional group of insects. There was considerable overlap in visitor profiles with flies having the greatest diversity. Reed bees (<i>Exoneura</i> sp.) and blow flies (<i>Calliphora</i> spp.) visited all plant species, followed by tachinid flies. Butterflies were recorded from all except <i>E. glabella</i> and <i>E. virgata</i>. The introduced honeybee accounted for over half of all observed visits, while bumblebees were occasional. The fact that rare <i>Epacris</i> use common native insects is arguably positive for their conservation as it buffers against pollinator decline. However, the presence of exotic visitors at their flowers underscores the need to consider the ecological impact of non-native pollinators in conservation planning. The invasion of <i>Epacris</i> breeding systems by the large super-generalist social bees is likely to be detrimental in the long term due not only to their efficiency in rapidly depleting nectar and pollen resources but also in their potential to irreversibly alter gene flow in small scattered and rare plant populations.</p>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.70285","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Elevational Distribution Patterns in an Australian Subtropical Rainforest Lizard Fauna 澳大利亚亚热带雨林蜥蜴区系的海拔分布格局
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-09-02 DOI: 10.1111/aec.70275
Paul M. Oliver, Daniel Sparks, Geoffrey Heard, Alienor L. M. Chauvenet, Melanie Venz
{"title":"Elevational Distribution Patterns in an Australian Subtropical Rainforest Lizard Fauna","authors":"Paul M. Oliver,&nbsp;Daniel Sparks,&nbsp;Geoffrey Heard,&nbsp;Alienor L. M. Chauvenet,&nbsp;Melanie Venz","doi":"10.1111/aec.70275","DOIUrl":"https://doi.org/10.1111/aec.70275","url":null,"abstract":"<p>Baseline data are critical to understanding the impacts of climatic change on the distribution of animals and plants. Here we present the results of elevational surveys for rainforest lizards along two routes in Lamington National Park in subtropical eastern Australia. Surveys were particularly focused on two threatened montane species: <i>Harrisoniascincus zia</i> and <i>Silvascincus tryoni</i>. Survey results were numerically dominated by four abundant taxa (including the two threatened montane specialists), although 10 species were recorded in total. <i>Silvascincus tryoni</i> was found to have a very narrow elevational distribution, with a considerably lower probability of occupancy at lower elevations where the congener <i>S. murrayi</i> dominated. The two focal montane specialists extended to significantly lower elevations along a deep gully and creekline when compared to a geographically proximate and broadly parallel ridgeline. Species in another genus of lizards—<i>Saproscincus</i>—were also far more abundant along the creekline. These data emphasise the potential importance of landscape heterogeneity in enabling both the elevational distribution of species in this community and their potential resilience to rising temperatures under climate change. These detailed data on lizard species that are relatively easy to survey and identify, and show contrasting distributions closely associated with elevation and temperature, provide a baseline for detecting future changes in Australia's subtropical montane rainforests.</p>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.70275","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Host Plant Effects on Soil Microbial Assemblages in Ultramafic Soils in New Caledonia: Insights From the Ni-Hyperaccumulator Pycnandra acuminata and Its Non-Hyperaccumulator Congener P. fastuosa 寄主植物对新喀里多尼亚超富性土壤微生物组合的影响:来自ni -超富集菌Pycnandra acuminata及其非超富集菌同系物P. fastuosa的见解
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-08-31 DOI: 10.1111/aec.70284
Pierre-Louis Stenger, Sandrine Isnard, Farid Juillot, Kelly Dinh, Valérie Burtet-Sarramegna, Pierre Mournet, Laurent Maggia, Fabian Carriconde
{"title":"Host Plant Effects on Soil Microbial Assemblages in Ultramafic Soils in New Caledonia: Insights From the Ni-Hyperaccumulator Pycnandra acuminata and Its Non-Hyperaccumulator Congener P. fastuosa","authors":"Pierre-Louis Stenger,&nbsp;Sandrine Isnard,&nbsp;Farid Juillot,&nbsp;Kelly Dinh,&nbsp;Valérie Burtet-Sarramegna,&nbsp;Pierre Mournet,&nbsp;Laurent Maggia,&nbsp;Fabian Carriconde","doi":"10.1111/aec.70284","DOIUrl":"https://doi.org/10.1111/aec.70284","url":null,"abstract":"<div>\u0000 \u0000 <p>Recent advances have highlighted the importance of soil microorganisms in the ecology of metal hyperaccumulators, yet the associated microbial communities of the iconic nickel-hyperaccumulating tree, <i>Pycnandra acuminata</i>, remain unexplored. Here, we used environmental DNA to characterise and compare the soil bacterial and fungal communities beneath <i>P. acuminata</i> and a sympatric non-accumulating congener, <i>Pycnandra fastuosa</i>, in an ultramafic tropical forest. By assessing diversity indices, we revealed distinct bacterial richness patterns associated with host species and soil horizons. Both bacterial and fungal communities were structured by host plant identity, but only fungal communities showed an additional effect of soil depth. Several microbial taxa—including Chaetothyriales, Dothideomycetes, Hyaloscyphaceae (fungi), and Myxococcota, PLTA13 (Proteobacteria), <i>Candidatus Udaeobacter</i>, <i>Chthoniobacter</i>, and <i>Bradyrhizobium</i> (bacteria) displayed strong associations with <i>P. acuminata</i>, many of which are known to tolerate or thrive in metal-rich environments. While the mechanisms linking hyperaccumulator trees and their microbial partners remained difficult to disentangle, our findings provide a foundation for future research into plant–microbe–metal interactions and may inform innovative approaches for sustainable mining and ecosystem management in metal-rich regions that host natives (hyper)accumulator species.</p>\u0000 </div>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943726","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
Caught Between Macrophytes and Human Impact: Zooplankton Facing Multiple Stressors in Tropical Waters 夹在大型植物和人类影响之间:热带水域浮游动物面临多重压力
IF 1.6 4区 环境科学与生态学
Austral Ecology Pub Date : 2026-08-27 DOI: 10.1111/aec.70282
Ana Paula S. da Conceição, Larissa Araújo dos Santos, Thaisa Sala Michelan, Leandro Juen, Francieli F. Bomfim
{"title":"Caught Between Macrophytes and Human Impact: Zooplankton Facing Multiple Stressors in Tropical Waters","authors":"Ana Paula S. da Conceição,&nbsp;Larissa Araújo dos Santos,&nbsp;Thaisa Sala Michelan,&nbsp;Leandro Juen,&nbsp;Francieli F. Bomfim","doi":"10.1111/aec.70282","DOIUrl":"https://doi.org/10.1111/aec.70282","url":null,"abstract":"<p>Tropical freshwater systems host diverse and functionally important zooplankton communities that are increasingly threatened by multiple stressors. Here, we assessed how land-use disturbance, local environmental conditions and macrophyte structure influence zooplankton richness, abundance and composition in Amazonian ponds and streams. Across 68 sites in Pará State, Brazil, we found that zooplankton composition differed significantly between system types (pond and stream), although richness and abundance were comparable. Landscape disturbance (mining and pasture) and riparian forest cover reduced zooplankton diversity—especially copepods and cladocerans—while macrophyte richness and abundance increased total and group-specific richness and abundance. High temperatures positively affected total zooplankton and rotifer diversity, whereas oxygen negatively affected copepods. These results reveal that both anthropogenic and habitat-related factors shape tropical zooplankton communities in complex, group-specific ways. Maintaining macrophyte-rich habitats and riparian vegetation may mitigate biodiversity loss and sustain ecosystem functioning in tropical freshwater systems under increasing human pressures.</p>","PeriodicalId":8663,"journal":{"name":"Austral Ecology","volume":"51 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.70282","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信
小红书