Ecological processes affecting community structure of blackfly larvae in regulated and unregulated rivers: a regional study

1998 ◽  
Vol 35 (5) ◽  
pp. 673-686 ◽  
Author(s):  
Yixin Zhang ◽  
Björn Malmqvist ◽  
Göran Englund
Keyword(s):  
Community Structure ◽  
Regional Study ◽  
Ecological Processes ◽  
Blackfly Larvae

scholarly journals Stable multi-level social structure is maintained by habitat geometry in a wild bird population

2016 ◽  
Author(s):  
Damien R. Farine ◽  
Ben C. Sheldon
Keyword(s):  
Community Structure ◽  
Social Structure ◽  
Radio Frequency Identification ◽  
Large Scale ◽  
Evolutionary Dynamics ◽  
Social Preferences ◽  
Population Level ◽  
Ecological Processes ◽  
Social Community ◽  
Animal Populations

ABSTRACTSocial structure can have profound evolutionary and ecological implications for animal populations. Structure can arise and be maintained via social preferences or be indirectly shaped by habitat structure. Understanding how social structure emerges is important for understanding the potential links between social structure and evolutionary and ecological processes. Here, we study a large community of wild birds fitted with uniquely-coded passive integrated transponder (PIT) tags and recorded on a grid of automated feeders fitted with radio frequency identification (RFID) antennae. We show that both large-scale and fine-scale network communities are consistent across years in this population, despite high generational turn-over. Studying the process that generates community structure, here the movement of individual birds across the woodland, suggests an important role of habitat geometry in shaping population-level social community structure. Our study highlights how relatively simple factors can produce apparent emergent social structure at the population scale, which has widespread implications for understanding eco-evolutionary dynamics.

scholarly journals Community Bioacoustics: Studying Acoustic Community Structure for Ecological and Conservation Insights

2021 ◽  
Vol 9 ◽  
Author(s):  
Vaibhav Chhaya ◽  
Sutirtha Lahiri ◽  
M. Abhinava Jagan ◽  
Ram Mohan ◽  
Nafisa A. Pathaw ◽  
...  
Keyword(s):  
Community Structure ◽  
Ecological Monitoring ◽  
Acoustic Signals ◽  
Analytical Framework ◽  
Ecological Change ◽  
Anthropogenic Change ◽  
Ecological Processes ◽  
Acoustic Data ◽  
Acoustic Community ◽  
Passive Acoustic

The diversity of animal acoustic signals has evolved due to multiple ecological processes, both biotic and abiotic. At the level of communities of signaling animals, these processes may lead to diverse outcomes, including partitioning of acoustic signals along multiple axes (divergent signal parameters, signaling locations, and timing). Acoustic data provides information on the organization, diversity and dynamics of an acoustic community, and thus enables study of ecological change and turnover in a non-intrusive way. In this review, we lay out how community bioacoustics (the study of acoustic community structure and dynamics), has value in ecological monitoring and conservation of diverse landscapes and taxa. First, we review the concepts of signal space, signal partitioning and their effects on the structure of acoustic communities. Next, we highlight how spatiotemporal ecological change is reflected in acoustic community structure, and the potential this presents in monitoring and conservation. As passive acoustic monitoring gains popularity worldwide, we propose that the analytical framework of community bioacoustics has promise in studying the response of entire suites of species (from insects to large whales) to rapid anthropogenic change.

scholarly journals Interactive network configuration maintains bacterioplankton community structure under elevated CO<sub>2</sub> in a eutrophic coastal mesocosm experiment

2018 ◽  
Vol 15 (2) ◽  
pp. 551-565 ◽  
Author(s):  
Xin Lin ◽  
Ruiping Huang ◽  
Yan Li ◽  
Futian Li ◽  
Yaping Wu ◽  
...  
Keyword(s):  
Community Structure ◽  
Elevated Co2 ◽  
Phytoplankton Bloom ◽  
Southern China ◽  
Early Stage ◽  
Mesocosm Experiment ◽  
Rrna Gene ◽  
Ecological Processes ◽  
Bacterioplankton Community ◽  
Carbon Pump

Abstract. There is increasing concern about the effects of ocean acidification on marine biogeochemical and ecological processes and the organisms that drive them, including marine bacteria. Here, we examine the effects of elevated CO2 on the bacterioplankton community during a mesocosm experiment using an artificial phytoplankton community in subtropical, eutrophic coastal waters of Xiamen, southern China. Through sequencing the bacterial 16S rRNA gene V3-V4 region, we found that the bacterioplankton community in this high-nutrient coastal environment was relatively resilient to changes in seawater carbonate chemistry. Based on comparative ecological network analysis, we found that elevated CO2 hardly altered the network structure of high-abundance bacterioplankton taxa but appeared to reassemble the community network of low abundance taxa. This led to relatively high resilience of the whole bacterioplankton community to the elevated CO2 level and associated chemical changes. We also observed that the Flavobacteria group, which plays an important role in the microbial carbon pump, showed higher relative abundance under the elevated CO2 condition during the early stage of the phytoplankton bloom in the mesocosms. Our results provide new insights into how elevated CO2 may influence bacterioplankton community structure.

scholarly journals Stochastic Community Assembly: Does It Matter in Microbial Ecology?

2017 ◽  
Vol 81 (4) ◽  
Author(s):  
Jizhong Zhou ◽  
Daliang Ning
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Ecology ◽  
Community Assembly ◽  
Community Diversity ◽  
Ecological Processes ◽  
Experimental Approaches ◽  
Deterministic Processes ◽  
Deterministic Components ◽  
Microbial Community Assembly

SUMMARY Understanding the mechanisms controlling community diversity, functions, succession, and biogeography is a central, but poorly understood, topic in ecology, particularly in microbial ecology. Although stochastic processes are believed to play nonnegligible roles in shaping community structure, their importance relative to deterministic processes is hotly debated. The importance of ecological stochasticity in shaping microbial community structure is far less appreciated. Some of the main reasons for such heavy debates are the difficulty in defining stochasticity and the diverse methods used for delineating stochasticity. Here, we provide a critical review and synthesis of data from the most recent studies on stochastic community assembly in microbial ecology. We then describe both stochastic and deterministic components embedded in various ecological processes, including selection, dispersal, diversification, and drift. We also describe different approaches for inferring stochasticity from observational diversity patterns and highlight experimental approaches for delineating ecological stochasticity in microbial communities. In addition, we highlight research challenges, gaps, and future directions for microbial community assembly research.

scholarly journals Zooplankton Community Structure in Shallow Saline Steppe Inland Waters

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1164
Author(s):  
Katalin Zsuga ◽  
Zarina Inelova ◽  
Emil Boros
Keyword(s):  
Community Structure ◽  
Large Scale ◽  
Zooplankton Community ◽  
Extreme Environment ◽  
Baseline Survey ◽  
Inland Waters ◽  
High Concentration ◽  
Regional Study ◽  
Zooplankton Community Structure ◽  
Saline Waters

Several shallow saline waters can be found in Central Asia in arid steppe climate, but our knowledge of their zooplankton community has been so far rather limited. The aim of our research was to provide data on the steppe zooplankton community in a large-scale regional study. Therefore, a baseline survey was carried out in 23 shallow inland waters of different salinity in Northern Kazakhstan. We measured the quantity and identified the taxonomic composition of zooplankton in the spring period and examined changes in community structure in correlation with salinity. Lesser salt concentration of the hyposaline–mesosaline waters was indicated by the presence of halophilic rotifer species: Brachionus asplanchnoides, Br. dimidiatus, Br. plicatilis. Mesosaline and hypersaline waters were indicated by the presence of halobiont crustaceans: Moina salina, Arctodiaptomus salinus, Cletocamptus retrogressus. Very high concentration of salt was indicated by presence of Artemia alone which is the only group, that can tolerate and adapt to this extreme environment. In the hypersaline waterbodies at over 79 gL−1 high TDS conditions a very simple tropical structure was found. Artemia playing monopolistic ecological function in the zooplankton community. We identified three characteristic groups of shallow inland saline waters based on their zooplankton composition.

The natural environment

2018 ◽  
Author(s):  
Philip James
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Natural Environment ◽  
Environmental Context ◽  
Urban Environments ◽  
Natural Ecosystem ◽  
New Combinations ◽  
Surrounding Area ◽  
Ecological Processes ◽  
Natural Communities

As urbanization occurs in a particular location, so there are changes to the natural environment. Habitats become fragmented. Disturbance increases. Species diversity is often reduced. While some habitats are lost, other new ones are created. New combinations of plants and animals, occurring as recombinant communities, replace natural communities. Community structure is simplified, as is succession. The result is a series of habitats and communities that are unlike those found outside urban environments. Many of the normal rules of ecology seem not to apply in urban environments as humans modify natural ecosystem cycles and flows. If abandoned, urban environments become colonized by plants and animals from the surrounding area and suspended ecological processes begin to function once more. Discussion of these themes completes Part I of the book and the analysis of the setting of the built, physical, and natural environmental context of urban environments.

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