scholarly journals Population Structure and Consumption Growth: Evidence from National Transfer Accounts

2021 ◽  
Vol 1 ◽  
pp. 1-15
Author(s):  
Michael Kuhn ◽  
Klaus Prettner
Keyword(s):  
Population Structure ◽  
Consumption Growth ◽  
National Transfer Accounts

Resource quality controls detritivore consumption, growth, survival and body condition recovery of reproducing females

2014 ◽  
Vol 65 (10) ◽  
pp. 910 ◽  
Author(s):  
Aitor Larrañaga ◽  
Ana Basaguren ◽  
Jesús Pozo
Keyword(s):  
Growth Rate ◽  
Population Structure ◽  
Protein Content ◽  
Body Condition ◽  
Secondary Production ◽  
Biomass Growth ◽  
Dissolved Nutrients ◽  
Resource Quality ◽  
Consumption Growth ◽  
Iteroparous Species

Although the effect of resource quality on density, biomass, growth rate and secondary production of consumers has been frequently documented, the direct repercussion of resource quality on reproduction has been less investigated. Here we tested the hypothesis that resource quality can limit body-condition recovery of reproducing individuals. For this, we reared ovigerous females of the freshwater amphipod Echinogammarus berilloni in the laboratory and fed them with leaves differing in quality (native Alnus, Quercus, or the exotic Eucalyptus) conditioned in three streams differing in the concentration of dissolved nutrients. Both consumption and growth rate, as well as the length-corrected mass and protein content of females after the release of the eggs, were negatively related to the C : N and C : P ratios of the resource. Survival was significantly lower with the exotic eucalypt leaf litter compared to native alder and oak, a result likely explained by the toxicity of the leaves. The conditioning of the leaves in the different streams did not affect the measured variables, although it interacted with survival. The present study suggests that resource quality can affect the recovery of body condition of reproducing females and shape the population structure of iteroparous species.

Genetic diversity and population structure of Populus yunnanensis revealed by SSR markers

2020 ◽  
Vol 52 (6) ◽  
Author(s):  
Anpei Zhou ◽  
Dan Zong ◽  
Peihua Gan ◽  
Yao Zhang ◽  
Dan Li ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Ssr Markers

Differentiation and Interrelations of Two Representatives of Laudakia stellio Complex (Reptilia: Agamidae) in Israel

2011 ◽  
Vol 4 (2) ◽  
pp. 102-114 ◽  
Author(s):  
Evgenyi N. Panov ◽  
Larissa Yu. Zykova
Keyword(s):  
Population Structure ◽  
Gene Flow ◽  
Habitat Preference ◽  
Additional Data ◽  
Near East ◽  
Field Studies ◽  
Subspecies Level ◽  
Limited Gene Flow ◽  
Study Sites ◽  
And Behavior

Field studies were conducted in Central Negev within the breeding range of Laudakia stellio brachydactyla and in NE Israel (Qyriat Shemona) in the range of an unnamed form (tentatively “Near-East Rock Agama”), during March – May 1996. Additional data have been collected in Jerusalem at a distance of ca. 110 km from the first and about 170 km from the second study sites. A total of 63 individuals were caught and examined. The animals were marked and their subsequent movements were followed. Social and signal behavior of both forms were described and compared. Lizards from Negev and Qyriat Shemona differ from each other sharply in external morphology, habitat preference, population structure, and behavior. The differences obviously exceed the subspecies level. At the same time, the lizards from Jerusalem tend to be intermediate morphologically between those from both above-named localities, which permits admitting the existence of a limited gene flow between lizard populations of Negev and northern Israel. The lizards from NE Israel apparently do not belong to the nominate subspecies of L. stellio and should be regarded as one more subspecies within the species.

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