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ecosystem functions of ants and dung beetles in agriculture-dominated Amazonian riparian forests

ECOLOGICAL ENTOMOLOGY 2024年第4期49卷 508-517页

作者： Ribeiro, Vanessa Soares Schoereder, Jose Henrique Sobrinho, Tathiana Guerra Brando, Paulo Monteiro Maracahipes-Santos, Leonardo Macedo, Marcia Nunes Paolucci, Lucas Navarro Univ Fed Vicosa Dept Biol Geral Vicosa MG Brazil Inst Pesquisa Ambiental Amazonia IPAM Canarana Brazil Univ Fed Vicosa Programa Posgrad Ecol Vicosa Brazil Univ Fed Espirito Santo Dept Ciencias Agr & Biol Sao Mateus Brazil Yale Univ Yale Sch Environm New Haven CT USA Woodwell Climate Res Ctr Falmouth MA USA

Land-use changes and habitat fragmentation can alter biodiversity and associated ecosystem functions. We investigated whether cropland expansion in south-east Amazonia decreases ecosystem functions performed by ants and dung beetles by altering their communities. We sampled both groups in two forest types, in south-eastern Amazonia: undisturbed riparian forests and riparian forests surrounded by croplands. We sampled ants and dung beetles with epigaeic pitfall traps, and experimentally assessed seed removal and predation by ants, and faeces and seed removal by dung beetles. Although ant and dung beetle abundance and richness did not differ across riparian forests, species composition of both groups did. Ants found seeds faster in undisturbed riparian forests, but the proportion of seed removal did not differ between forests. The abundance of predatory ants and the predation of termites by ants did not differ between forests. Seed and dung removal by dung beetles did not differ across riparian forests. Despite the observed differences in dung beetle composition, we did not find the effects on ecosystem functions probably due a functional redundancy of species. The quality of ecosystem functions provided by ants is lower in riparian forests surrounded by croplands, while changes in dung beetle diversity did not impact their ecosystem functions, with potential effects on the natural recovery of these disturbed riparian forests. Ant and dung beetle species composition differed between undisturbed riparian and riparian forests surrounded by croplands, but abundance and richness of ants and dung beetle species did not differ across riparian forests. Ants found seeds faster in undisturbed riparian forests, but the amount of seed removal did not differ between forests, while dung beetle-mediated processes did not differ across riparian forests. Riparian forests surrounded by croplands maintained most ecosystem functions performed by ants and dung beetles, which potentially

关键词： Amazon Forest ants dung beetles ecosystem functions riparian forests seed removal

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Microbial communities mediate the effect of cover cropping on soil ecosystem functions under precipitation reduction in an agroecosystem

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SCIENCE OF THE TOTAL ENVIRONMENT 2024年 947卷 174572页

作者： Guo, Yanqing Wang, Huan Du, Lanlan Shi, Peng Du, Sen Xu, Zhiwen Jiao, Shuo Chen, Wenfeng Chen, Sanfeng Wei, Gehong Northwest A&F Univ Coll Life Sci State Key Lab Crop Stress Resistance & High Effici Shaanxi Key Lab Agr & Environm Microbiol Yangling 712100 Shaanxi Peoples R China Linyi Univ Coll Life Sci Linyi 276000 Peoples R China Linyi Univ Coll Resources & Environm Shandong Prov Key Lab Water & Soil Conservat & Env Linyi 276000 Peoples R China Natl Agrotech Extens & Serv Ctr Beijing 100125 Peoples R China Lingxian Biol Agr Co Ltd Qinhuangdao 066000 Peoples R China China Agr Univ Coll Biol Sci Beijing 100193 Peoples R China

Cover cropping is a sustainable agricultural practice that profoundly influences soil microbial communities and ecosystem functions. However, the responses of soil ecosystem functions and microbial communities to cover cropping under the projected changes in precipitation, remain largely unexplored. To address this gap, a field experiment with cover cropping (control, hairy vetch, ryegrass, and hairy vetch plus ryegrass) and precipitation reduction (ambient precipitation and 50 % reduction in ambient precipitation) treatments was conducted from 2018 to 2020 in an agroecosystem located in the Guanzhong Plain of China. Soil ecosystem functions related to nutrient storage, nutrient cycling, and organic matter decomposition were measured to assess the soil multifunctionality index and bacterial and fungal communities were determined by Illumina NovaSeq sequencing. The results indicated that cover cropping enhanced soil multifunctionality index, and reduced precipitation strengthened this effect. Microbial community composition, rather than microbial diversity, was significantly altered by cover cropping regardless of precipitation reduction. Cover cropping increased the microbial network complexity and stability, but this effect was dampened by reduced precipitation. The microbial community composition and network complexity significantly and positively correlated with soil multifunctionality index under ambient and reduced precipitation conditions. Linear regression analyses and structural equation models collectively demonstrated that the increase in soil multifunctionality index was attributed to cover croppinginduced changes in microbial community composition and network complexity, irrespective of precipitation reduction. This study highlights the crucial role of microbial communities in driving the response of soil multifunctionality to cover cropping in the context of reduced precipitation, which has important implications for agricultural management and sustaina

关键词： Soil microbiome ecosystem functions Network analysis Cover crops Precipitation change

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The subalpine shrub Dasiphora fruticosa alters seasonal and elevational effects on soil microbial diversity and ecosystem functions on the Tibetan Plateau

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JOURNAL OF APPLIED ECOLOGY 2023年第1期60卷 52-63页

作者： Wang, Xiaosai Michalet, Richard He, Shuang Wang, Xiangtai Lanzhou Univ Coll Ecol State Key Lab Grassland Agroecosyst Lanzhou Peoples R China Univ Bordeaux EPOC UMR CNRS 5805 Talence France

High-altitude ecosystems of the Tibetan Plateau are undergoing significant global changes that may stimulate an intense shrub encroachment. The occurrence of shrubs in alpine meadow is commonly thought to alleviating environmental stresses and supporting high diversity which may have important consequences for ecosystem functions. However, few studies have assessed whether and how the role of shrubs interact with season and elevation. In this study, we explored the effects of the shrub, Dasiphora fruticosa, on microbial (alpha- and beta-) diversity and the consequences for ecosystem functions (multifunctionality and the turnover of functions) at five sites along an elevation gradient and across three seasons on the Tibetan Plateau. According to linear mixed-effect models and structural equation modelling, D. fruticosa altered season and elevation effects and tended to increase microbial alpha-diversity, soil carbon-nitrogen (C:N) ratio, understorey biomass and leaf dry matter content, which overall increased soil multifunctionality. We also found that indicators of soil multifunctionality were always positively related to fungal alpha-diversity, whereas negatively related to bacterial alpha-diversity. Furthermore, the effects of season, elevation, shrub and their interactions on microbial beta-diversity can be explained by temperature, soil water content, pH and understorey biomass, as shown by distance-based redundancy analysis. Then, we found that D. fruticosa strongly altered the effects of season and elevation on microbial beta-diversity and the turnover of soil C:N ratio, understorey biomass and litter quality, thus influencing ecosystem function turnover. Our results, thus, provided explicit evidences that Dasiphora fruticosa could alter season and elevation effects on species diversity with important consequences on ecosystem functions, highlighting the crucial role of the shrub in affecting ecosystem functions by creating heterogeneous microbial communities

关键词： above-ground-below-ground linkages beta-diversity Dasiphora frutkosa ecosystem functions microbial diversity seasonal dynamics Tibetan Plateau woody encroachment

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Land-use types impact soil ecosystem functions by altering the soil multitrophic biodiversity and interactions

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SOIL ECOLOGY LETTERS 2025年第2期7卷 1-13页

作者： Zhang, Tian-Lun Zhang, Shao-Yang Wang, Lu Lin, Da Ni, Bang Cai, Tian-Gui Du, Shuai Zhu, Dong Chinese Acad Sci Inst Urban Environm State Key Lab Reg & Urban Ecol Ningbo Observat & Res Stn Xiamen 361021 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China CAS Haixi Ind Technol Innovat Ctr Beilun Zhejiang Key Lab Urban Environm Proc & Pollut Cont Ningbo 315830 Peoples R China

Soil biodiversity and ecosystem functions were examined using eDNA technologies. Multitrophic guilds display distinct community structures in five land-use types. Keystone species shape microbial composition and support ecosystem functions. Land-use types affect ecosystem functions by altering multitrophic interactions. Although the contribution of biodiversity to supporting ecosystem functions is well established in soil ecosystems, previous studies have often overlooked the importance of potential multitrophic interactions in supporting ecosystem functions. This study analyzed the effects of land uses on potential multitrophic interactions and their impacts on soil ecosystem functions, using soil environmental DNA samples from five land-use types. Results showed that land use can influence soil ecosystem functions by altering the soil multitrophic biodiversity and interactions. Keystone species are crucial in shaping the soil microbial composition, mediating network interactions, and supporting the ecosystem function. This study promotes the understanding of the mechanisms behind changes in biodiversity and ecosystem services resulting from land-use changes and is beneficial to making informed trade-offs in urban planning.

关键词： soil biodiversity ecosystem functions multitrophic interactions land uses environmental DNA keystone species

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Belowground plant traits and their ecosystem functions along aridity gradients in grasslands

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PLANT AND SOIL 2023年第1-2期487卷 39-48页

作者： Klimesova, Jitka Martinkova, Jana Bartuskova, Alena Ott, Jacqueline P. Czech Acad Sci Dept Expt & Funct Morphol Inst Bot Dukelska 135 Trebon 37901 Czech Republic Charles Univ Prague Fac Sci Dept Bot Benatska 2 Prague 2 Czech Republic US Forest Serv Forest & Grassland Res Lab Rocky Mt Res Stn Rapid City SD USA

ecosystem responses to environmental change are usually studied solely using aboveground (usually leaf) traits. However, belowground plant traits, such as fine roots and coarse belowground organs, likely play a crucial role in ecosystem response, especially under aridifcation. We conducted a literature survey on belowground plant traits along aridity gradients in temperate grasslands to propose which effect traits might be connected with abrupt vegetation changes that would occur with aridification due to environmental change. With increasing aridity, seasonal regeneration decreasingly relies on recruitment from the belowground bud bank and increasingly relies on regeneration from seeds. This leads to greater inter-annual variability in biomass production. Other belowground traits, such as bud bearing organs and fine root distribution in the soil, also shifts along the aridity gradient. As aridifcation begins, we propose that plants would become more conservative in their belowground traits producing lower amounts of belowground litter. Increasing aridifcation would lead to the loss of rhizomatous plants from the community and a prevalence of deep rooting plants leading to changes in soil resource utilization and increasing susceptibility to soil erosion. Under extreme aridification, perennial plants, except those with bulbs, would be lost from the community and replaced by annuals which produce low amounts of litter and use only ephemeral water resources in the upper soil layers. Belowground plant traits, such as belowground clonal growth organs, bud banks, and fine root distributions, may provide a more mechanistic understanding behind shifts in ecosystem functioning due to environmental change.

关键词： Aridity Belowground plant organs ecosystem functions Fine roots Grasslands Rhizomes

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Analyzing trophic ecosystem functions with the interaction functional space

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TRENDS IN ECOLOGY & EVOLUTION 2023年第5期38卷 424-434页

作者： Bello, Carolina Schleuning, Matthias Graham, Catherine H. Swiss Fed Inst Forest Snow & Landscape Res WSL Zurcherstr 111 CH-8903 Birmensdorf Switzerland Swiss Fed Inst Technol Inst Integrat Biol Univ str 2 CH-8092 Zurich Switzerland Senckenberg Biodivers & Climate Res Ctr SBiK F Senckenberganlage 25 D-60325 Frankfurt Germany

Quantifying the vulnerability of ecosystems to global change requires a better understanding of how trophic ecosystem functions emerge. So far, trophic eco -system functions have been studied from the perspective of either functional diversity or network ecology. To integrate these two perspectives, we propose the interaction functional space (IFS) a conceptual framework to simultaneously analyze the effects of traits and interactions on trophic functions. We exemplify the added value of our framework for seed dispersal and wood decomposition and show how species interactions influence the relationship between functional trait diversity and trophic functions. We propose future applications for a range of functions where the IFS can help to elucidate mechanisms underpinning trophic functions and facilitate understanding of functional changes in ecosystems amidst global change.

关键词： ecosystem functions species interactions trait diversity

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Scaling-up ecosystem functions of coastal heterogeneous sediments: testing practices using high resolution data

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LANDSCAPE ECOLOGY 2022年第6期37卷 1603-1614页

作者： Schenone, Stefano Thrush, Simon F. Univ Auckland Inst Marine Sci Auckland 1142 New Zealand

Context Heterogeneity in coastal soft sediments and the difficulty of data collection hinder our ability to scale up ecological data (necessarily obtained at small-scale) to large-scale. The use of scaling in marine ecology is not as common as in terrestrial ecology and current practices are often too simplistic and inadequate. Objectives We aimed to demonstrate that the use of different scaling approaches leads to considerably different results and that not accounting for ecological heterogeneity decreases our ability to accurately extrapolate measurements of ecosystem functions performed by intertidal soft sediment habitats. Methods High resolution raster maps of sediment denitrification, ammonia (NH4+) efflux and organic matter degradation were sampled to produce a simulated dataset and compare the performance of three different scaling approaches: direct scaling, spatial allometry and semivariogram/kriging. Results Direct scaling underestimated denitrification, NH4+ efflux and organic matter degradation (84.1, 84.9 and 90.3% less) while allometry underestimated denitrification (81.9% less) but overestimated NH4+ efflux and organic matter degradation (2594.1 and 14,879.9% more). Kriging produced more accurate results and the predicted functions only differed from the estimated values by 14.7, 29.4 and 3.9% respectively. Conclusions Our work shows that the choice of the scaling method is crucial in estimating intertidal soft sediment functions and highlights the need for empirical and theoretical models that link ecosystem functioning to biological attributes that can be measured remotely over large areas. Integrating measures of heterogeneity through the spatial structure of the data leads to outcomes that are more realistic and relevant to resource management.

关键词： Intertidal landscapes Scaling ecosystem functions Heterogeneity Benthic fluxes

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Embracing mountain microbiome and ecosystem functions under global change

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NEW PHYTOLOGIST 2022年第6期234卷 1987-2002页

作者： Wang, Jianjun Hu, Ang Meng, Fanfan Zhao, Wenqian Yang, Yunfeng Soininen, Janne Shen, Ji Zhou, Jizhong Chinese Acad Sci State Key Lab Lake Sci & Environm Nanjing Inst Geog & Limnol Nanjing 210008 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China Hunan Agr Univ Coll Resources & Environm Changsha 410128 Peoples R China Tsinghua Univ Sch Environm State Key Joint Lab Environm Simulat & Pollut Con Beijing 100084 Peoples R China Univ Helsinki Dept Geosci & Geog FIN-00014 Helsinki Finland Nanjing Univ Sch Geog & Ocean Sci Nanjing 210023 Peoples R China Univ Oklahoma Inst Environm Genom Norman OK 73019 USA Univ Oklahoma Dept Microbiol & Plant Biol Norman OK 73019 USA Lawrence Berkeley Natl Lab Earth & Environm Sci Berkeley CA 94720 USA

Mountains are pivotal to maintaining habitat heterogeneity, global biodiversity, ecosystem functions and services to humans. They have provided classic model natural systems for plant and animal diversity gradient studies for over 250 years. In the recent decade, the exploration of microorganisms on mountainsides has also achieved substantial progress. Here, we review the literature on microbial diversity across taxonomic groups and ecosystem types on global mountains. Microbial community shows climatic zonation with orderly successions along elevational gradients, which are largely consistent with traditional climatic hypotheses. However, elevational patterns are complicated for species richness without general rules in terrestrial and aquatic environments and are driven mainly by deterministic processes caused by abiotic and biotic factors. We see a major shift from documenting patterns of biodiversity towards identifying the mechanisms that shape microbial biogeographical patterns and how these patterns vary under global change by the inclusion of novel ecological theories, frameworks and approaches. We thus propose key questions and cutting-edge perspectives to advance future research in mountain microbial biogeography by focusing on biodiversity hypotheses, incorporating meta-ecosystem framework and novel key drivers, adapting recently developed approaches in trait-based ecology and manipulative field experiments, disentangling biodiversity-ecosystem functioning relationships and finally modelling and predicting their global change responses.

关键词： biodiversity drivers ecosystem functions elevational gradients global change manipulated experiments meta-ecosystems microorganisms

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Effects of artemisinin sustained-release algaecides on in-situ cyanobacterial inhibition and microbes-floating plants dominated ecosystem functions in artificial landscape lake

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JOURNAL OF HAZARDOUS MATERIALS 2024年 480卷 136182页

作者： Ma, Yushen Zhu, Xiaoming Ni, Lixiao Du, Cunhao Sang, Wenlu Xu, Chu Shi, Jiahui Li, Yiping Li, Shiyin Pang, Yalun Zhang, Linyun Hohai Univ Key Lab Integrated Regulat & Resource Dev Shallow Minist Educ Coll Environm 1Xi Kang Rd Nanjing 210098 Peoples R China CCCC Shanghai Waterway Engn Design & Consulting Co Shanghai 200120 Peoples R China Nanjing Normal Univ Coll Environm Nanjing 210024 Peoples R China China Pharmaceut Univ Coll Engn Nanjing 211198 Peoples R China

The artemisinin sustained-release algaecides (ASAs) have been proven to be a safe and effective mean of inhibiting cyanobacteria in laboratory experiments. However, their effectiveness and impacts on ecosystem functions (EF) in natural waters are still unclear. In this study, the in-situ inhibitory effect of ASAs on cyanobacteria in natural waters was investigated over a period of 110 days to assess EF impacts dominated by microbes and floating plants. The results indicated that ASAs had a long-term inhibitory effect on cyanobacteria. ASAs did not affect sediment but increased TOC and TP in the water column in 2-10 days. Microbial diversity and network analyses indicated that ASAs enhanced bacterial diversity, network complexity, and hub-bacteria in networks. Metabolic pathway predictions and CCA analysis showed that ASAs maintained the stability of EF by enhancing the metabolic capacities of bacteria, and the relationships between metabolic microorganisms and environmental factors. PLS-PM revealed that ASAs primarily drove bacterial resistance to cyanobacteria, which was the key mechanism for its long-term inhibition of cyanobacteria. However, the early outbreak of floating plants was not conducive to the long-term inhibition of cyanobacteria by ASAs. This study provides new insights into the mechanisms and ecological impacts of cyanobacterial inhibition by ASAs in complex aquatic environments.

关键词： In-situ cyanobacterial inhibition Microbial biodiversity Floating plants ecosystem functions

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Consequences of Land Management on ecosystem functions and Services in Subtropical Agroecosystems

Consequences of Land Management on Ecosystem Functions and S...

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作者： Guo, Yuxi University of Florida

学位级别：Ph.D., Doctor of Philosophy

Management intensification and human-induced disturbances in agroecosystems are crucial to boosting agricultural yields and attaining human livelihoods, but meanwhile are dominant global change drivers that may lead to adverse environmental consequences, such as water pollution, greenhouse gas emission, and biodiversity loss. Therefore, it is critical to understand how agricultural management and disturbances affect biological communities, ecological processes, and their underlying functions and services. Such knowledge is particularly scarce in subtropical landscapes that are unique in regard to their humid climate and numerous embedded natural wetlands in agroecosystems. Using a combination of data synthesis, field experiment, laboratory soil, plant, and microbiome analyses, I investigated effects of land management on multiple ecosystem functions and services in subtropical agroecosystems, and further focused on organic matter decomposition and soil microbial communities in embedded wetlands that fundamental to maintaining their functions and services. Specifically, in Chapter 2, I demonstrated that management intensification could alter magnitude and relationship of multiple ecosystem services, and their effects cascaded from managed grasslands to embeded natural wetland ecosystems. In Chapter 3 and 5, I found that decomposition of both standardized plant material and in situ plant litter in wetlands were either individually or interactively affected by upland management intensification, grazing and fire disturbances, with effects manifested through changes in wetland biotic and abiotic conditions. Regarding to biotic conditions, I further identified the composition of wetland soil bacterial and fungal communities in Chapter 4, and revealed their significant responses to land management from both taxonomic and functional potential perspectives. These microbial responses, in turn, interacted with litter traits or soil properties to affect wetland litter decomposi

关键词： Subtropical agroecosystems Land management ecosystem functions

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