Response of epilithic diatom communities to environmental gradients along an Ecuadorian Andean River
نویسندگان
چکیده
منابع مشابه
Relationship of Epilithic Diatom Communities to Environmental Variables in Yedikır Dam Lake (Amasya, Turkey)
In order to evaluate the composition and seasonal variations of the epilithic diatoms in Yedikır Dam Lake were studied using samples collected from the stones in the barrier area between November 2004 and April 2006. The diatom communities were diverse; 88 taxa were found, belonging to the Bacillariophyta. Cymbella minuta, Cyclotella ocellata and Encyonema silesiacum have become the most abunda...
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Studies of species diversity patterns across regional environmental gradients seldom consider the impact of habitat type on within-site (alpha) and between-site (beta) diversity. This study is designed to identify the influence of habitat type across geographic and environmental space, on local patterns of species richness and regional turnover patterns of ant diversity in the northeastern Unit...
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An important goal for community ecology is the characterization and prediction of changes in community patterns along environmental gradients. We aimed to identify the major environmental correlates of diatom distribution patterns in boreal running waters. We classified 197 stream sites based on their diatom flora. Direct ordination methods were then used to identify the key environmental deter...
متن کاملLimits to adaptation along environmental gradients.
Why do species not adapt to ever-wider ranges of conditions, gradually expanding their ecological niche and geographic range? Gene flow across environments has two conflicting effects: although it increases genetic variation, which is a prerequisite for adaptation, gene flow may swamp adaptation to local conditions. In 1956, Haldane proposed that, when the environment varies across space, "swam...
متن کاملTitle of Dissertation : SPATIAL AND TEMPORAL VARIABILITY OF BACTERIOPLANKTON COMMUNITIES ACROSS RIVER TO OCEAN ENVIRONMENTAL GRADIENTS
Bacterioplankton communities are deeply diverse within and across environments, yet also display repeatable patterns over seasonal and annual time scales. I assessed patterns of bacterioplankton community variability across the Columbia River coastal margin over space and time. Coastal zones encompass a complex spectrum of environmental gradients, which impact the composition of bacterioplankto...
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ژورنال
عنوان ژورنال: Comptes Rendus Biologies
سال: 2018
ISSN: 1631-0691
DOI: 10.1016/j.crvi.2018.03.008