Results 81 to 90 of about 66,140 (200)

Trophic state and microorganisms community of major sub-basins of the middle Rio Doce basin, southeast Brazil

open access: yesBrazilian Archives of Biology and Technology, 2005
Total phosphorus concentration was used to define the trophic state of the main sub-basins of the middle Rio Doce, in Minas Gerais State (southeast Brazil) and physical, chemical, and microbiological variables of water were analyzed during 2000 to 2001 ...
Mauricio Mello Petrucio   +3 more
doaj   +1 more source

Trophic State Classification of Lakes with Aquatic Macrophytes

open access: yes, 1983
We developed an approach for assessing the trophic status of lakes having growths of aquatic macrophytes because conventional criteria for classifying trophic state emphasize conditions in the open water and ignore the nutrients, plant biomass, and ...
Michael J. Maceina   +5 more
core   +1 more source

Marine fisheries resources of the north coast of Central Java, Indonesia [PDF]

open access: yes
A trophic model of the marine fisheries resources of the north coast of Central Java, Indonesia was constructed using the Ecopath with Ecosim software and data from a trawl survey conducted in the area in 1979.
Nurhakim, S.
core  

Species Richness and Trophic Diversity Increase Decomposition in a Co-Evolved Food Web [PDF]

open access: yes, 2011
Ecological communities show great variation in species richness, composition and food web structure across similar and diverse ecosystems. Knowledge of how this biodiversity relates to ecosystem functioning is important for understanding the maintenance ...
Ellison Aaron M.   +12 more
core   +1 more source

Bacteria and phytoplankton production rates in eight river stretches of the middle Rio Doce hidrographic basin (southeast Brazil)

open access: yesBrazilian Archives of Biology and Technology, 2005
Measurements of bacterial secondary production (BSP), together with primary phytoplanktonic production (PPP) were conducted during dry and rainy seasons, in eight rivers of different orders submitted to different degrees of human impacts (different ...
Mauricio Mello Petrucio   +2 more
doaj   +1 more source

Trophic state and potential productivity assessment for Qaroun Lake using spatial techniques. [PDF]

open access: yesEnviron Monit Assess, 2023
Mohamed HM   +5 more
europepmc   +1 more source

Evaluating the influence of lake morphology, trophic status and diagenesis on geochemical profiles in lake sediments

open access: yes, 2010
Recent geochemical studies provide evidence that changes in vertical distributions of nutrients in lake sediments are driven by anthropogenic activities, based primarily on trends of increasing concentrations in upper sediment layers.
Pilditch, Conrad A.   +2 more
core   +1 more source

Crustacean zooplankton distribution patterns and their biomass as related to trophic indicators of 29 shallow subtropical lakes [PDF]

open access: yes, 2007
A comparative limnological study was carried out to present a snapshot of crustacean zooplankton communities and their relations to environmental factors to test whether there is a consistent relationship between crustacean biomass and trophic indicators
Wu, Shikal   +4 more
core   +1 more source

Trophic State Drives the Diversity of Protists in a Tropical River (New River, Belize). [PDF]

open access: yesMicroorganisms, 2022
Barbosa M   +5 more
europepmc   +1 more source

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