scholarly journals Habitat structure and body size distributions: cross-ecosystem comparison for taxa with determinate and indeterminate growth

Oikos ◽  
2014 ◽  
Vol 123 (8) ◽  
pp. 971-983 ◽  
Author(s):  
Kirsty L. Nash ◽  
Craig R. Allen ◽  
Chris Barichievy ◽  
Magnus Nyström ◽  
Shana Sundstrom ◽  
...  
Keyword(s):  
Body Size ◽  
Habitat Structure ◽  
Size Distributions ◽  
Indeterminate Growth ◽  
Ecosystem Comparison

Cross-scale Habitat Structure Drives Fish Body Size Distributions on Coral Reefs

Ecosystems ◽  
2012 ◽  
Vol 16 (3) ◽  
pp. 478-490 ◽  
Author(s):  
Kirsty L. Nash ◽  
Nicholas A. J. Graham ◽  
Shaun K. Wilson ◽  
David R. Bellwood
Keyword(s):  
Body Size ◽  
Coral Reefs ◽  
Habitat Structure ◽  
Size Distributions

scholarly journals Sex, Age, and Body Size Distributions of Western Sandpipers During the Nonbreeding Season With Respect to Local Habitat

The Condor ◽  
2006 ◽  
Vol 108 (3) ◽  
pp. 547-557 ◽  
Author(s):  
Guillermo Fernández ◽  
David B. Lank
Keyword(s):  
Population Structure ◽  
Body Size ◽  
Local Density ◽  
Late Winter ◽  
Size Distributions ◽  
Nonbreeding Season ◽  
Age Class ◽  
Migratory Shorebirds ◽  
Western Sandpipers ◽  
Northwestern Mexico

AbstractWe documented the local density and sex, age-class, and body size distributions of Western Sandpipers (Calidris mauri) among habitats at Bahía Santa María, northwestern Mexico, during the nonbreeding season. Three habitats were recognized: brackish flats, mangroves, and cattail marshes, which we ranked as richest to poorest in food resources and safest to most dangerous in predation danger. Western Sandpiper population structure differed among habitats. Bird densities were highest in brackish flats, the richest and safest habitat, and males and adults of both sexes were overrepresented. In cattail marshes, which appeared to be the poorest and most dangerous habitat, bird densities were lower, and the sex ratio and age ratios within each sex were more even. In mangroves, bird densities were similar to those in cattail marshes, but sex and age ratios were similar to those in brackish flats. Exposed culmen, an index of structural size, was not related to habitat use in either sex. Body mass of immature males was more variable than that of adults among habitats and immature males gained mass throughout the winter. Birds in brackish flats and mangroves were initially heavier, but tended to lose mass, whereas birds in cattail marshes were initially lighter, but tended to gain mass. Mass distributions thus converged in late winter. While the social and ecological causes and significance of differential sex and age-class distributions among habitats remain largely unquantified, evidence from this and previous studies suggests that nonbreeding population structure is a common phenomenon with important implications for migratory shorebirds.

scholarly journals Cladoceran body size distributions along temperature and trophic gradients in the conterminous USA

2020 ◽  
Author(s):  
John R Beaver ◽  
Claudia E Tausz ◽  
Katherine M Black ◽  
Benjamin A Bolam
Keyword(s):  
Climate Change ◽  
Body Size ◽  
Multiple Regression ◽  
Water Clarity ◽  
Total Biomass ◽  
Ecosystem Structure ◽  
Strong Positive Correlation ◽  
Size Distributions ◽  
Strong Negative Correlation ◽  
Lake Ecosystems

Abstract Body size is an important functional trait that can be indicative of ecosystem structure and constraints on growth. Both increasing temperatures and eutrophication of lakes have been associated with a shift toward smaller zooplankton taxa. This is important in the context of climate change, as most aquatic habitats are expected to warm over the coming decades. Our study uses data from over 1000 lakes surveyed across a range of latitudes (26–49°N) and surface temperatures (10–35°C) in the USA during the spring/summer of 2012 to characterize pelagic cladoceran body size distributions. We used univariate and multiple regression modeling to determine which environmental parameters were strongly correlated to cladoceran body size. A strong positive correlation was observed between cladoceran body size and latitude, while a strong negative correlation was observed between cladoceran body size and water temperature. The ratio of zooplankton to phytoplankton, as well as relative total biomass contributions by cladocerans, decreased as trophic state increased. Multiple regression identified temperature-related variables and water clarity as significantly affecting cladoceran body size. These observations demonstrate the dual threat of climate change and eutrophication on lake ecosystems and highlight potential changes in biogeographical patterns of zooplankton as lakes warm.

The evolution of body size distributions

1995 ◽  
Vol 10 (5) ◽  
pp. 205
Author(s):  
Robert A. Martin
Keyword(s):  
Body Size ◽  
Size Distributions

Constraints on body-size distributions: an experimental test of the habitat architecture hypothesis

2001 ◽  
Vol 70 (2) ◽  
pp. 248-259 ◽  
Author(s):  
Rebecca Leaper ◽  
Dave Raffaelli ◽  
Chas Emes ◽  
Bryan Manly
Keyword(s):  
Body Size ◽  
Experimental Test ◽  
Size Distributions ◽  
Habitat Architecture

Altered body size distributions in a large river fish community enriched by sewage

2002 ◽  
Vol 59 (5) ◽  
pp. 819-828 ◽  
Author(s):  
Adrian M.H deBruyn ◽  
David J Marcogliese ◽  
Joseph B Rasmussen
Keyword(s):  
Body Size ◽  
Upper Bound ◽  
Fish Community ◽  
Local Variation ◽  
Large River ◽  
Habitat Characteristics ◽  
Size Distributions ◽  
Treated Sewage ◽  
Energetic Constraints ◽  
River Fish

We used two approaches (interspecific upper bound and normalized biomass spectrum, NBS) to study size distributions in a littoral fish community across a natural gradient of epiphytic primary production and at sites enriched by primary-treated sewage. The upper bound of the interspecific density – body size relationship supported universal energetic constraints on the regional assemblage but revealed substantial variation in size distributions at a local scale. Multivariate analysis of the modes composing the NBS suggested possible mechanisms for this local variation in size distributions. Only the largest organisms had higher densities at higher levels of productivity. Densities of smaller organisms could be explained by a combination of habitat characteristics and feeding interactions.

Gradient of Fish Predation Alters Body Size Distributions of Lake Benthos

Ecology ◽  
2000 ◽  
Vol 81 (2) ◽  
pp. 374 ◽  
Author(s):  
Steven C. Blumenshine ◽  
David M. Lodge ◽  
James R. Hodgson
Keyword(s):  
Body Size ◽  
Fish Predation ◽  
Size Distributions
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