Results 91 to 100 of about 5,114 (181)

Variación estructural de la comunidad perifítica colonizadora de sustratos artificiales en la zona de ritral del río Medellín, Colombia

open access: yesRevista de Biología Tropical, 2007
Se colocaron muestreadores de material acrílico con portaobjetos a nivel subsuperficial en dos estaciones de recolección en la parte alta del río Medellín.
Yimmy Montoya M, John J Ramírez R
doaj  

Hydrochemistry, ostracods and diatoms in a deep, tropical, crater lake in Western Mexico

open access: yesJournal of Limnology, 2013
Crater lakes are sensitive to natural and anthropogenic environmental changes and it is important to define and understand their current status in order to evaluate past changes related to climate variability and future ones associated with modern global
Margarita Caballero   +5 more
doaj   +1 more source

Conservación y recuperación de la tortuga Carey (eretmochelys imbricata) del pacífico oriental, en el caso de El Salvador. [PDF]

open access: yes, 2008
Las tortugas carey (Eretmochelys imbricata) fueron en una época muy abundantes en el Pacífico Oriental (PO) pero en la actualidad es una de las poblaciones de tortugas marinas más amenazadas a nivel mundial.
Jandres, Mauricio V.   +3 more
core  

Diversity of oligochaeta (Annelida) and Chironomidae (Diptera) of the argentinian Fluvial Litoral [PDF]

open access: yes, 2004
Oligochaetes and chironomids are considered by many authors as biological indicators of environmental conditions and are represented for a great species diversity in the benthic, pleuston and periphyton communities of different habitats.
Marchese Garello, Mercedes Rosa   +1 more
core   +1 more source

Productividad, estado trófico y dinámica fitoplanctónica en la laguna Sauce Grande y su afluente homónimo (pcia. de Buenos Aires, Argentina) [PDF]

open access: yes, 2016
The shallow lake Sauce Grande is located in the southwest of Buenos Aires province. It is a widening of the Sauce Grande River that flows in and out of the lake.
Cony, Noelia Leonor   +3 more
core  

Testing the feasibility of coral nurseries in an upwelling area in the North Pacific of Costa Rica

open access: yesFrontiers in Marine Science
The decline of coral reefs has increased interest in ecological restoration. Due to the scarcity of coral gardening projects in the Eastern Tropical Pacific, improving our understanding of such techniques is key.
Sònia Fabregat-Malé   +5 more
doaj   +1 more source

The littoral sea cucumbers (Echinodermata: Holothuroidea) of Guam re-assessed - a diversity curve that still does not asymptote [PDF]

open access: yes, 2013
The Micronesian island of Guam has been an important site for the study of littoral tropical holothuriantaxonomy for almost 200 years. Despite substantial attention by both expeditions and resident taxonomists, new records arestill regularly added to the
Borrero-Perez, G.H.   +15 more
core  

Understanding the color variability and resolving taxonomic confusion in the sea cucumber Isostichopus badionotus (Echinodermata, Holothuroidea): a revision of the genus Isostichopus

open access: yesEuropean Journal of Taxonomy
Isostichopus badionotus (Selenka, 1867) is distributed in the Atlantic Ocean. It has been recognized as a species with highly variable intraspecific coloration.
Giomar H. Borrero-Pérez   +2 more
doaj   +1 more source

Chironomidae (Diptera) in water courses of the Puna and Chaco Serrano of Catamarca (Argentina): first records and distribution of genus and species [PDF]

open access: yes, 2015
La distribución en América del Sur (Region Neotropical) de Stictocladius prati Saether & Cranston, Podonomus. regalis Brundin y P. setosus Brundin 1966 es ampliada a partir de primeros registros de la Argentina.
Paggi, Analia Constancia   +1 more
core   +1 more source

Influencia de los procesos naturales y antrópicos sobre la calidad del agua en cuatro embalses cubanos [PDF]

open access: yes, 2012
The waters of the reservoirs Paso Bonito, Avilés, Abreus and El Salto, located at south-center of Cuba, are used in agriculture, fishing, industries and human consumption.
Betancourt, Carmen   +2 more
core  

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