Ecosystem Functioning and Community Structure as Indicators for Assessing Environmental Impacts: Leaf Processing and Macroinvertebrates in Atlantic Forest Streams

2011 ◽  
Vol 96 (6) ◽  
pp. 656-666 ◽  
Author(s):  
Eduardo F. Silva-Junior ◽  
Timothy P. Moulton
Keyword(s):  
Community Structure ◽  
Environmental Impacts ◽  
Atlantic Forest ◽  
Ecosystem Functioning ◽  
Leaf Processing ◽  
Forest Streams

scholarly journals Effects of riparian deforestation on benthic invertebrate community and leaf processing in Atlantic forest streams

2020 ◽  
Vol 18 (4) ◽  
pp. 277-282
Author(s):  
Monalisa Silva-Araújo ◽  
Eduardo F. Silva-Junior ◽  
Vinicius Neres-Lima ◽  
Rafael Feijó-Lima ◽  
Flavia Tromboni ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Benthic Invertebrate ◽  
Invertebrate Community ◽  
Leaf Processing ◽  
Benthic Invertebrate Community ◽  
Forest Streams

scholarly journals Stochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community

mBio ◽  
2013 ◽  
Vol 4 (2) ◽  
Author(s):  
Jizhong Zhou ◽  
Wenzong Liu ◽  
Ye Deng ◽  
Yi-Huei Jiang ◽  
Kai Xue ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Diversity ◽  
Microbial Community Structure ◽  
Community Assembly ◽  
Ecosystem Functioning ◽  
Dominant Role ◽  
Microbial Biodiversity ◽  
Stochastic Assembly

ABSTRACTThe processes and mechanisms of community assembly and its relationships to community functioning are central issues in ecology. Both deterministic and stochastic factors play important roles in shaping community composition and structure, but the connection between community assembly and ecosystem functioning remains elusive, especially in microbial communities. Here, we used microbial electrolysis cell reactors as a model system to examine the roles of stochastic assembly in determining microbial community structure and functions. Under identical environmental conditions with the same source community, ecological drift (i.e., initial stochastic colonization) and subsequent biotic interactions created dramatically different communities with little overlap among 14 identical reactors, indicating that stochastic assembly played dominant roles in determining microbial community structure. Neutral community modeling analysis revealed that deterministic factors also played significant roles in shaping microbial community structure in these reactors. Most importantly, the newly formed communities differed substantially in community functions (e.g., H2production), which showed strong linkages to community structure. This study is the first to demonstrate that stochastic assembly plays a dominant role in determining not only community structure but also ecosystem functions. Elucidating the links among community assembly, biodiversity, and ecosystem functioning is critical to understanding ecosystem functioning, biodiversity preservation, and ecosystem management.IMPORTANCEMicroorganisms are the most diverse group of life known on earth. Although it is well documented that microbial natural biodiversity is extremely high, it is not clear why such high diversity is generated and maintained. Numerous studies have established the roles of niche-based deterministic factors (e.g., pH, temperature, and salt) in shaping microbial biodiversity, the importance of stochastic processes in generating microbial biodiversity is rarely appreciated. Moreover, while microorganisms mediate many ecosystem processes, the relationship between microbial diversity and ecosystem functioning remains largely elusive. Using a well-controlled laboratory system, this study provides empirical support for the dominant role of stochastic assembly in creating variations of microbial diversity and the first explicit evidence for the critical role of community assembly in influencing ecosystem functioning. The results presented in this study represent important contributions to the understanding of the mechanisms, especially stochastic processes, involved in shaping microbial biodiversity.

Compensatory dynamics on the community structure of fruit-feeding butterflies across hyper-fragmented Atlantic forest habitats

2019 ◽  
Vol 98 ◽  
pp. 276-284 ◽  
Author(s):  
Bruno K.C. Filgueiras ◽  
Douglas H.A. Melo ◽  
Márcio Uehara-Prado ◽  
André Victor L. Freitas ◽  
Inara R. Leal ◽  
...  
Keyword(s):  
Community Structure ◽  
Atlantic Forest ◽  
Forest Habitats

Local and landscape factors affecting tadpole diversity in subtropical Atlantic Forest streams

2019 ◽  
Vol 44 (8) ◽  
pp. 1311-1321
Author(s):  
Maria Aparecida Cristo Anciutti ◽  
Veluma Ialú Molinari De Bastiani ◽  
Jacir Dal Magro ◽  
Fabio Luiz Carasek ◽  
Ronei Baldissera ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Factors Affecting ◽  
Landscape Factors ◽  
Forest Streams

Morphological traits and vertical distribution of hyporheic chironomid larvae in Atlantic Forest streams

2019 ◽  
Vol 32 (3) ◽  
pp. 119-134
Author(s):  
Riccardo Mugnai ◽  
Arlindo Serpa-Filho ◽  
Jorge Luiz Nessimian ◽  
Adriano Brilhante Kury ◽  
Silvia Vendruscolo Milesi
Keyword(s):  
Vertical Distribution ◽  
Atlantic Forest ◽  
Morphological Traits ◽  
Chironomid Larvae ◽  
Forest Streams

scholarly journals Vascular epiphytes of the Atlantic Forest in the Sinos River basin, state of Rio Grande do Sul, Brazil: richness, floristic composition and community structure

2015 ◽  
Vol 75 (2 suppl) ◽  
pp. 25-35 ◽  
Author(s):  
MD Barbosa ◽  
DFP Becker ◽  
S Cunha ◽  
A Droste ◽  
JL Schmitt
Keyword(s):  
Community Structure ◽  
River Basin ◽  
Atlantic Forest ◽  
Floristic Composition ◽  
Rio Grande ◽  
Shannon Index ◽  
Rio Grande Do Sul ◽  
Importance Value ◽  
Ecological Zones ◽  
Vascular Epiphytes

<p>The Atlantic Forest, which has a vast epiphytic richness, is a priority area for preservation, listed as one of the five most important world hotspots. Vascular epiphyte richness, composition and community structure were studied in two fragments, one of the ombrophilous (29º43'42"S and 50º22'00"W) and the other of the seasonal (29º40'54"S and 51º06'56"W) forest, both belonging to the Atlantic Forest biome in the Sinos River basin, Rio Grande do Sul, Brazil. In each fragment, 40 trees, divided into four ecological zones, were analyzed. In each zone, the occurrence of the species was recorded, and the importance value of each species was calculated according to the frequency of phorophytes and intervals, and cover scores. The Shannon index was calculated for the two communities. In the fragment of the ombrophilous forest (F1), 30 epiphytic species were recorded, and in the seasonal forest (F2), 25. The highest importance value was found for <italic>Microgramma squamulosa</italic> (Kaulf.) de la Sota in both fragments. The diversity indexes for F1 (H'=2.72) and F2 (H'=2.55) were similar and reflected the subtropical location of the areas. The decrease in mean richness in both fragments in zone 3 (internal crown) to zone 4 (external crown) may be associated with time and space availability for epiphyte occupation and microclimate variations. Exclusive species were found in the areas, which suggest that a greater number of preserved fragments may result in a greater number of preserved epiphytic species in the Sinos River basin.</p>

Spatial ecology of the water opossum Chironectes minimus in Atlantic Forest streams

2016 ◽  
Vol 81 (5) ◽  
pp. 480-487 ◽  
Author(s):  
Melina de Souza Leite ◽  
Maron Galliez ◽  
Thiago Lopes Queiroz ◽  
Fernando A.S. Fernandez
Keyword(s):  
Atlantic Forest ◽  
Spatial Ecology ◽  
Forest Streams
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