The Ecology and Management of Wood in World Rivers

2003 ◽  
Keyword(s):  
Life History ◽  
Habitat Structure ◽  
Food Resources ◽  
Riparian Areas ◽  
Wildlife Species ◽  
Clear Link ◽  
Aquatic Wildlife ◽  
Riparian Habitats ◽  
Abundance And Diversity ◽  
World Rivers

<em>Abstract.</em>—Wood in rivers, or wood deposited from fluvial processes, provides unique habitat for terrestrial and aquatic wildlife species. Many wildlife species utilize riparian areas for some portion of their life history primarily due to the universal need for water, the presence of unique plant assemblages, and the diversity of microhabitats produced by the dynamics of river systems. Wood in rivers provides four primary functions for aquatic and terrestrial wildlife species: habitat structure, shelter, patchiness of habitat, and increased food resources. Abundance and diversity of wildlife species are enhanced by wood in rivers, and they, in turn, shape and maintain aquatic and riparian habitats. Though there is a clear link between wood in rivers and riparian wildlife communities, knowledge about their interactions and interdependence is sparse.

Perfluorinated compounds in some terrestrial and aquatic wildlife species from Poland

2007 ◽  
Vol 42 (6) ◽  
pp. 715-719 ◽  
Author(s):  
J. Falandysz ◽  
S. Taniyasu ◽  
N. Yamashita ◽  
P. Rostkowski ◽  
K. Zalewski ◽  
...  
Keyword(s):  
Perfluorinated Compounds ◽  
Wildlife Species ◽  
Aquatic Wildlife

scholarly journals Associations between Benthic Cover and Habitat Complexity Metrics Obtained from 3D Reconstruction of Coral Reefs at Different Resolutions

2020 ◽  
Vol 12 (6) ◽  
pp. 1011 ◽  
Author(s):  
Atsuko Fukunaga ◽  
John H. R. Burns ◽  
Kailey H. Pascoe ◽  
Randall K. Kosaki
Keyword(s):  
Fractal Dimension ◽  
Coral Reefs ◽  
Habitat Structure ◽  
Coral Cover ◽  
Three Dimensional ◽  
Structural Complexity ◽  
Coralline Algae ◽  
Crustose Coralline Algae ◽  
Surface Areas ◽  
Abundance And Diversity

Quantifying the three-dimensional (3D) habitat structure of coral reefs is an important aspect of coral reef monitoring, as habitat architecture affects the abundance and diversity of reef organisms. Here, we used photogrammetric techniques to generate 3D reconstructions of coral reefs and examined relationships between benthic cover and various habitat metrics obtained at six different resolutions of raster cells, ranging from 1 to 32 cm. For metrics of 3D structural complexity, fractal dimension, which utilizes information on 3D surface areas obtained at different resolutions, and vector ruggedness measure (VRM) obtained at 1-, 2- or 4-cm resolution correlated well with benthic cover, with a relatively large amount of variability in these metrics being explained by the proportions of corals and crustose coralline algae. Curvature measures were, on the other hand, correlated with branching and mounding coral cover when obtained at 1-cm resolution, but the amount of variability explained by benthic cover was generally very low when obtained at all other resolutions. These results show that either fractal dimension or VRM obtained at 1-, 2- or 4-cm resolution, along with curvature obtained at 1-cm resolution, can effectively capture the 3D habitat structure provided by specific benthic organisms.

Concentration of bat activity in riparian habitats over an elevational gradient

1999 ◽  
Vol 77 (6) ◽  
pp. 972-977 ◽  
Author(s):  
S D Grindal ◽  
J L Morissette ◽  
R M Brigham
Keyword(s):  
Elevational Gradient ◽  
Relative Activity ◽  
Activity Levels ◽  
Riparian Areas ◽  
Habitat Types ◽  
Bat Activity ◽  
Prey Resources ◽  
Riparian Habitats ◽  
Mist Net ◽  
Capture Rates

Riparian areas are generally assumed to represent important foraging areas for insectivorous bats, but this contention has rarely been formally quantified. To test this assumption, we used bat detectors to compare the relative activity levels of a community of temperate-zone bat species between riparian (lake) and upland (cutblock) habitats at three different elevations (ranging from 540 to 1800 m) in a forested area of southern British Columbia. In addition, we also investigated the sex and age class distributions of bats (based on mist-net captures) between riparian and upland habitats among the elevational zones. Bat activity levels were significantly greater in riparian than upland areas (10 and 40 times greater for foraging and commuting activity, respectively). Capture rates were greater in riparian areas and biased towards females, suggesting that female bats may preferentially select riparian areas, probably because of the abundant prey resources typically associated with this habitat. Captures of females also predominated at lower elevations, whereas males were captured more often in higher elevation zones. Our data support the assumption that riparian habitats represent important foraging and probably drinking areas for bats. The sex bias and differences in capture rates and activity levels need to be considered when designing bat surveys in different habitat types or over elevational gradients.

scholarly journals Availability of food resources and habitat structure shape the individual‐resource network of a Neotropical marsupial

2019 ◽  
Vol 9 (7) ◽  
pp. 3946-3957 ◽  
Author(s):  
Nícholas F. Camargo ◽  
Hernani F. M. Oliveira ◽  
Juliana F. Ribeiro ◽  
Amabílio J. A. Camargo ◽  
Emerson M. Vieira
Keyword(s):  
Habitat Structure ◽  
Food Resources ◽  
Resource Network ◽  
The Individual

Alteration of Habitat Structure and Food Resources by Invasive Smooth Cordgrass Affects Habitat Use by Wintering Saltmarsh Birds at Chongming Dongtan, East China

The Auk ◽  
2010 ◽  
Vol 127 (2) ◽  
pp. 317-327 ◽  
Author(s):  
Xiaojing Gan ◽  
Chiyeung Choi ◽  
Yong Wang ◽  
Zhijun Ma ◽  
Jiakuan Chen ◽  
...  
Keyword(s):  
Habitat Use ◽  
Habitat Structure ◽  
Food Resources ◽  
East China ◽  
Smooth Cordgrass

scholarly journals A residence time theory for biodiversity

2018 ◽  
Author(s):  
Kenneth J Locey ◽  
Jay T Lennon
Keyword(s):  
Life History ◽  
Residence Time ◽  
Ecological Communities ◽  
Ecological Relationships ◽  
Scientific Disciplines ◽  
Individual Based Models ◽  
Growth Activity ◽  
Ecological Hierarchy ◽  
Abundance And Diversity ◽  
Time Theory

From microorganisms to the largest macroorganisms, much of Earth’s biodiversity is subject to forces of physical turnover. Residence time is the ratio of an ecosystem’s size to its rate of flow and provides a means for understanding the influence of physical turnover on biological systems. Despite its use across scientific disciplines, residence time has not been integrated into the broader understanding of biodiversity, life history, and the assembly of ecological communities. Here, we propose a residence time theory for the growth, activity, abundance, and diversity of traits and taxa in complex ecological systems. Using thousands of stochastic individual-based models to simulate energetically constrained life history processes, we show that our predictions are conceptually sound, mutually compatible, and support ecological relationships that underpin much of biodiversity theory. We discuss the importance of residence time across the ecological hierarchy and propose how residence time can be integrated into theories ranging from population genetics to macroecology.

scholarly journals A residence time theory for biodiversity

2018 ◽  
Author(s):  
Kenneth J Locey ◽  
Jay T Lennon
Keyword(s):  
Life History ◽  
Residence Time ◽  
Ecological Communities ◽  
Ecological Relationships ◽  
Scientific Disciplines ◽  
Individual Based Models ◽  
Growth Activity ◽  
Ecological Hierarchy ◽  
Abundance And Diversity ◽  
Time Theory

From microorganisms to the largest macroorganisms, much of Earth’s biodiversity is subject to forces of physical turnover. Residence time is the ratio of an ecosystem’s size to its rate of flow and provides a means for understanding the influence of physical turnover on biological systems. Despite its use across scientific disciplines, residence time has not been integrated into the broader understanding of biodiversity, life history, and the assembly of ecological communities. Here, we propose a residence time theory for the growth, activity, abundance, and diversity of traits and taxa in complex ecological systems. Using thousands of stochastic individual-based models to simulate energetically constrained life history processes, we show that our predictions are conceptually sound, mutually compatible, and support ecological relationships that underpin much of biodiversity theory. We discuss the importance of residence time across the ecological hierarchy and propose how residence time can be integrated into theories ranging from population genetics to macroecology.

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