scholarly journals Meter scale variation in shrub dominance and soil moisture structure Arctic arthropod communities

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2224 ◽  
Author(s):  
Rikke Reisner Hansen ◽  
Oskar Liset Pryds Hansen ◽  
Joseph J. Bowden ◽  
Urs A. Treier ◽  
Signe Normand ◽  
...  
Keyword(s):  
Species Richness ◽  
Soil Moisture ◽  
Community Structure ◽  
Indicator Species ◽  
The Arctic ◽  
Arthropod Community ◽  
Vegetation Height ◽  
Habitat Variation ◽  
Shrub Dominance ◽  
Scale Variation

The Arctic is warming at twice the rate of the rest of the world. This impacts Arctic species both directly, through increased temperatures, and indirectly, through structural changes in their habitats. Species are expected to exhibit idiosyncratic responses to structural change, which calls for detailed investigations at the species and community level. Here, we investigate how arthropod assemblages of spiders and beetles respond to variation in habitat structure at small spatial scales. We sampled transitions in shrub dominance and soil moisture between three different habitats (fen, dwarf shrub heath, and tall shrub tundra) at three different sites along a fjord gradient in southwest Greenland, using yellow pitfall cups. We identified 2,547 individuals belonging to 47 species. We used species richness estimation, indicator species analysis and latent variable modeling to examine differences in arthropod community structure in response to habitat variation at local (within site) and regional scales (between sites). We estimated species responses to the environment by fitting species-specific generalized linear models with environmental covariates. Species assemblages were segregated at the habitat and site level. Each habitat hosted significant indicator species, and species richness and diversity were significantly lower in fen habitats. Assemblage patterns were significantly linked to changes in soil moisture and vegetation height, as well as geographic location. We show that meter-scale variation among habitats affects arthropod community structure, supporting the notion that the Arctic tundra is a heterogeneous environment. To gain sufficient insight into temporal biodiversity change, we require studies of species distributions detailing species habitat preferences.

scholarly journals Meter scale variation in shrub dominance and soil moisture structure Arctic arthropod communities

2016 ◽  
Author(s):  
Rikke Reisner Hansen ◽  
Oskar Liset Pryds Hansen ◽  
Joseph J Bowden ◽  
Urs A Treier ◽  
Signe Normand ◽  
...  
Keyword(s):  
Species Richness ◽  
Soil Moisture ◽  
Community Structure ◽  
Indicator Species ◽  
The Arctic ◽  
Arthropod Community ◽  
Vegetation Height ◽  
Habitat Variation ◽  
Shrub Dominance ◽  
Scale Variation

The Arctic is warming at twice the rate of the rest of the world. This impacts Arctic species both directly, through increased temperatures, and indirectly, through structural changes in their habitats. Species are expected to exhibit idiosyncratic responses to structural change, which calls for detailed investigations at the species and community level. Here, we investigate how arthropod assemblages of spiders and beetles respond to variation in habitat structure at small spatial scales. We sampled transitions in shrub dominance and soil moisture between three different habitats (fen, dwarf shrub heath, and tall shrub tundra) at three different sites along a fjord gradient in southwest Greenland, using yellow pitfall cups. We identified 2547 individuals belonging to 47 species. We used species richness estimation, indicator species analysis and latent variable modeling to examine differences in arthropod community structure in response to habitat variation at local (within site) and regional scales (between sites). We estimated species responses to the environment by fitting species-specific generalized linear models with environmental covariates. Species assemblages were segregated at the habitat and site level. Each habitat hosted significant indicator species, and species richness and diversity were significantly lower in fen habitats. Assemblage patterns were significantly linked to changes in soil moisture and vegetation height, as well as geographic location. We show that meter-scale variation among habitats affects arthropod community structure, supporting the notion that the Arctic tundra is a heterogenous environment. To gain sufficient insight into temporal biodiversity change, we require studies of species distributions detailing species habitat preferences.

scholarly journals Meter scale variation in shrub dominance and soil moisture structure Arctic arthropod communities

2016 ◽  
Author(s):  
Rikke Reisner Hansen ◽  
Oskar Liset Pryds Hansen ◽  
Joseph J Bowden ◽  
Urs A Treier ◽  
Signe Normand ◽  
...  
Keyword(s):  
Species Richness ◽  
Soil Moisture ◽  
Community Structure ◽  
Indicator Species ◽  
The Arctic ◽  
Arthropod Community ◽  
Vegetation Height ◽  
Habitat Variation ◽  
Shrub Dominance ◽  
Scale Variation

The Arctic is warming at twice the rate of the rest of the world. This impacts Arctic species both directly, through increased temperatures, and indirectly, through structural changes in their habitats. Species are expected to exhibit idiosyncratic responses to structural change, which calls for detailed investigations at the species and community level. Here, we investigate how arthropod assemblages of spiders and beetles respond to variation in habitat structure at small spatial scales. We sampled transitions in shrub dominance and soil moisture between three different habitats (fen, dwarf shrub heath, and tall shrub tundra) at three different sites along a fjord gradient in southwest Greenland, using yellow pitfall cups. We identified 2547 individuals belonging to 47 species. We used species richness estimation, indicator species analysis and latent variable modeling to examine differences in arthropod community structure in response to habitat variation at local (within site) and regional scales (between sites). We estimated species responses to the environment by fitting species-specific generalized linear models with environmental covariates. Species assemblages were segregated at the habitat and site level. Each habitat hosted significant indicator species, and species richness and diversity were significantly lower in fen habitats. Assemblage patterns were significantly linked to changes in soil moisture and vegetation height, as well as geographic location. We show that meter-scale variation among habitats affects arthropod community structure, supporting the notion that the Arctic tundra is a heterogenous environment. To gain sufficient insight into temporal biodiversity change, we require studies of species distributions detailing species habitat preferences.

Corrigendum to: Fish in the matrix: effects of landscape on community-structure patterns of the ichthyofauna of streams in Cerrado

2020 ◽  
Vol 71 (9) ◽  
pp. 1219
Author(s):  
Thiago Bernardi Vieira ◽  
Leandro Schlemmer Brasil ◽  
Naiara Raiol Torres ◽  
Tatiana Lima de Melo ◽  
Elto Aparecido Moreira ◽  
...  
Keyword(s):  
Land Use ◽  
Species Richness ◽  
Community Structure ◽  
Species Composition ◽  
Indicator Species ◽  
Matrix Effects ◽  
Native Vegetation ◽  
Generalist Species ◽  
The Matrix ◽  
Structure Patterns

This study aims to identify species richness and composition patterns of the ichthyofauna in different landscape matrices (forest, pasture and eucalypt crops) and to evaluate the variation of species composition in different matrices, identifying possible indicator species. We selected 21 streams; 7 were surrounded by native vegetation, 9 surrounded by pasture and 5 by eucalypt crops. We tested whether there was difference in the composition and species richness. In addition, we used the indicator value (IndVal) to verify if there were species faithful and specific to some land use and land cover. Streams located in forest presented the highest estimated species richness, followed by streams in pasturelands and eucalypt matrices. There was no difference between the composition of fishes in different matrices, but we observed a relationship between Phenacorhamdia somnians (Mees, 1974) and pasture matrix. The results indicated that the change in land use may benefit some generalist species such as Phenacorhamdia somnians.

Fish in the matrix: effects of landscape on community-structure patterns of the ichthyofauna of streams in Cerrado

2020 ◽  
Vol 71 (9) ◽  
pp. 1211 ◽  
Author(s):  
Thiago Bernardi Vieira ◽  
Leandro Schlemmer Brasil ◽  
Naiara Raiol Torres ◽  
Tatiana Lima de Melo ◽  
Elto Aparecido Moreira ◽  
...  
Keyword(s):  
Land Use ◽  
Species Richness ◽  
Community Structure ◽  
Species Composition ◽  
Indicator Species ◽  
Matrix Effects ◽  
Native Vegetation ◽  
Generalist Species ◽  
The Matrix ◽  
Structure Patterns

This study aims to identify species richness and composition patterns of the ichthyofauna in different landscape matrices (forest, pasture and eucalypt crops) and to evaluate the variation of species composition in different matrices, identifying possible indicator species. We selected 21 streams; 7 were surrounded by native vegetation, 9 surrounded by pasture and 5 by eucalypt crops. We tested whether there was difference in the composition and species richness. In addition, we used the indicator value (IndVal) to verify if there were species faithful and specific to some land use and land cover. Streams located in forest presented the highest estimated species richness, followed by streams in pasturelands and eucalypt matrices. There was no difference between the composition of fishes in different matrices, but we observed a relationship between Phenacorhamdia somnians (Mees, 1974) and pasture matrix. The results indicated that the change in land use may benefit some generalist species such as Phenacorhamdia somnians.

scholarly journals Response of bacterioplankton community structure to an artificial gradient of <i>p</i>CO<sub>2</sub> in the Arctic Ocean

2012 ◽  
Vol 9 (8) ◽  
pp. 10645-10668 ◽  
Author(s):  
R. Zhang ◽  
X. Xia ◽  
S. C. K. Lau ◽  
C. Motegi ◽  
M. G. Weinbauer ◽  
...  
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Bacterial Community ◽  
Ocean Acidification ◽  
Bacterial Diversity ◽  
Bacterial Community Structure ◽  
Total Alkalinity ◽  
16S Rrna Genes ◽  
The Arctic ◽  
Rrna Genes

Abstract. The influences of ocean acidification on bacterial diversity were investigated using DNA fingerprinting and clone library analysis of bacterioplankton samples collected from the largest CO2 manipulation mesocosm study that had been performed thus far. Terminal restriction fragment length polymorphism analysis of the PCR amplicons of the 16S rRNA genes revealed that bacterial diversity, species richness and community structure varied with the time of incubation but not the degree of ocean acidification. The phylogenetic composition of the major bacterial assemblage after a 30-day incubation under various pCO2 concentrations did not show clear effects of pCO2 levels. However, the maximum apparent diversity and species richness which occurred during incubation differed in the high and low pCO2 treatments, in which different bacterial community structure harbored. In addition, total alkalinity was one of the contributing factors for the temporal variations in bacterial community structure observed during incubation. A negative relationship between the relative abundance of Bacteroidetes and pCO2 levels was observed for samples at the end of the experiment. Our study suggested that ocean acidification affected the development of bacterial assemblages and potentially impacts the ecological function of the bacterioplankton in the marine ecosystem.

A comparative study on orthopteroid assemblages along a moisture gradient in the Western Carpathians

Biologia ◽  
2007 ◽  
Vol 62 (1) ◽  
Author(s):  
Vladimír Gavlas ◽  
Jozef Bednár ◽  
Anton Krištín
Keyword(s):  
Species Richness ◽  
Soil Moisture ◽  
Comparative Study ◽  
Indicator Species ◽  
Moisture Gradient ◽  
Western Carpathians ◽  
Habitat Types ◽  
Indicator Value ◽  
Moisture Conditions ◽  
Sweep Net

AbstractOrthopteroid assemblages (orders Orthoptera and Mantodea) were compared along moisture gradient at five sites of the Slovak Karst in southern Slovakia. A total of 40 species were recorded by sweep-net sampling. The occurence of each identified species varied with soil moisture and other factors. Sites with similar moisture conditions tend to have similar assemblages. No species occurred simultaneously at the wettest and driest sites. There were two principal and five subordinate assemblages within the moisture gradient. Assemblages were related to the two commonest habitat types demarcated by the presence of different indicator species. Total orthopteroid species richness and number of grasshopper (Acridoidea) species increased linearly with falling soil moisture and Ellenbergs’s indicator value for moisture.

scholarly journals Nidicolous beetle species richness is driven by Barn Owl’s nests occupancy and landscape structure

2021 ◽  
Author(s):  
Vivien Cosandey ◽  
Robin Séchaud ◽  
Paul Béziers ◽  
Yannick Chittaro ◽  
Andreas Sanchez ◽  
...  
Keyword(s):  
Species Richness ◽  
Landscape Structure ◽  
Barn Owl ◽  
Arthropod Community ◽  
Tyto Alba ◽  
Nest Material ◽  
Crop Fields ◽  
Nest Boxes ◽  
Bird Droppings ◽  
Barn Owls

AbstractBird nests are specialized habitats because of their particular composition including nest detritus and bird droppings. In consequence, they attract a specialized arthropod community considered as nidicolous, which includes species only found in bird nests (strictly nidicolous) or sometimes found in bird nests (facultatively nidicolous). Because the factors influencing the entomofauna in bird nests are poorly understood, in autumn 2019, we collected nest material in 86 Barn Owl (Tyto alba) nest boxes. We investigated whether the invertebrate species richness was related to Barn Owl nest box occupancy, the density of available nest boxes and the landscape structure. We found 3,321 nidicolous beetle specimens belonging to 24 species. Species richness of strictly nidicolous beetles was 2.7 times higher in nest boxes occupied by a family of Barn Owls the previous spring compared to unoccupied nest boxes. It was also higher in sites that were more often occupied by Barn Owls in the five previous years and in areas surrounded by a higher proportion of crop fields. For facultatively nidicolous beetles, the density of Barn Owl nest boxes enhanced the species richness. In conclusion, our study suggests that the strictly nidicolous beetles benefit from occupied nest boxes of Barn Owls, whereas facultatively nidicolous beetles look for nest boxes independently of whether Barn Owls occupy them. Our study highlights the importance of bird nests for a suite of invertebrates.

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