Results 81 to 90 of about 65,254 (294)
, 2005 We present a mathematical analysis of the speciation model for food-web structure, which had in previous work been shown to yield a good description of empirical data of food-web topology. The degree distributions of the network are derived.
A.G. Rossberg +35 more
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The Anatomical Record, EarlyView.Abstract Notosuchians were key components of western Gondwanan Cretaceous ecosystems in terrestrial predator niches and exhibited remarkable taxonomic and ecological diversity. Previous research has explored their physiology, metabolism, and histology, revealing varied growth patterns and life history strategies.
Tito Aureliano +5 more
wiley +1 more source
The Anatomical Record, EarlyView.Abstract Teleocichla comprises small cichlids that inhabit the rapid streams of Amazonian rivers; however, there has been limited research on their encephalon morphology. This study examined the neuroanatomy of four species, focusing on volumetric measurements of their encephalon subregions, and providing a histological description of the encephalon of
Renan Leão‐Reis +4 more
wiley +1 more source
Arctic Science, 2021 We analyzed Arctic char (Salvelinus alpinus (Linnaeus, 1758)) stable isotope ratios and fatty acid composition from two geographically proximal Nunavut lakes, Qasigiyat and Iqalugaarjuit, to determine if anadromous and resident Arctic char occupied ...
Kendra L. Ulrich, Ross F. Tallman
doaj +1 more source
Biology, 2022 Widespread introductions of non-native species, including aquaculture and ornamental species, threaten biodiversity and ecosystem functioning by modifying the trophic structure of communities.
Fangmin Shuai, Jie Li
doaj +1 more source
The Anatomical Record, EarlyView.Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro +1 more
wiley +1 more source
Trophic ecology of sea urchins in coral-rocky reef systems, Ecuador [PDF]
PeerJ, 2016 Sea urchins are important grazers and influence reef development in the Eastern Tropical Pacific (ETP). Diadema mexicanum and Eucidaris thouarsii are the most important sea urchins on the Ecuadorian coastal reefs.
Nancy Cabanillas-Terán +3 more
doaj +2 more sources
Food Webs: Experts Consuming Families of Experts
, 2005 The question what determines the structure of natural food webs has been listed among the nine most important unanswered questions in ecology. It arises naturally from many problems related to ecosystem stability and resilience.
Amemiya, T. +3 more
core +1 more source
Analytical solution of a model for complex food webs [PDF]
, 2002 We investigate numerically and analytically a recently proposed model for food webs [Nature {\bf 404}, 180 (2000)] in the limit of large web sizes and sparse interaction matrices.
D. J. Watts +20 more
core +3 more sources
Predictable Patterns Of Disruptive Selection In Stickleback In Postglacial Lakes [PDF]
, 2008 Disruptive selection is often assumed to be relatively rare, because it is dynamically unstable and hence should be transient. However, frequency-dependent interactions such as intraspecific competition may stabilize fitness minima and make disruptive ...
Bolnick, Daniel I., Lau, On Lee
core +1 more source