Influencia de las macrófitas sobre la estructura poblacional de rotíferos y microscrustáceos en un plano de inundación tropical

Abstract

The influence of macrophytes on rotifer and microcrustacean assemblage in a tropical floodplain. Most studies on zooplankton ecology have been conducted in open waters. However, it has been considered of great importance to extend such studies to other habitats, such as those generated of macrophytes. We studied the spatial and temporal variation of the microcrustacean and rotifer assemblage structures associated with macrophytes, and compare them with the variation exhibited in open waters. Integrated samples were collected for zooplankton and phytoplankton biomass using a Schindler bottle, in four open water sites and four other sites covered by macrophytes in the floodplain complex of Ayapel (Córdoba, Colombia) during different limnimetric levels. The significant differences in the structure were evaluated using Kruskal & Wallis and discriminant analyses, and the similarity among sampling sites was evaluated using Bray & Curtis analysis. Zooplanktonic richness was favored by macrophytes. However, we did not find a constant spatial pattern for density, and only particular trends apparently conditionated by flood pulses. The presence of Eichhornia azurea (Pontederiaceae) contributed in a significant way with an increase in the diversity and density of benthic taxa. The density of some zooplanktonic groups was related with environmental conditions and phytoplanktonic biomass. Rev. Biol. Trop. 59 (2): 853-870. Epub 2011 June 01.

Effect of Spatial Heterogeneity on Zooplankton Diversity: A Multi-Scale Habitat Approximation in a Floodplain Lake

“…redox conditions and flushing/dilution mechanisms). The inverse relationship between water level and zooplankton abundance was repeatedly reported in South American floodplain lakes (José de Paggi and Paggi, ; Lansac‐Tôha et al ., ; Villabona‐González et al ., ).…”

“…Emergent macrophytes play a similar role, especially in turbid ecosystems, where submerged macrophytes are limited Cazzanelli et al, 2008). Finally, free-floating macrophytes reduce light penetration and oxygen availability in the water column (de Tezanos Pinto et al, 2007;O'Farrell et al, 2009) and while reducing phytoplankton diversity (O'Farrell et al, 2009) are associated to rich communities of zooplankton (Serafim et al, 2003;Gazulha et al, 2011;Villabona-González et al, 2011), macroinvertebrates (Poi de Neiff, 2003;Fontanarrosa et al, 2012) and fishes (Agostinho et al, 2007;Teixeira de Mello et al, 2009).…”

ANÁLISIS HISTÓRICO DE LA BIOLOGÍA DE LA CHEREHUITA (Hubbsina turneri) (PISCES:GOODEIDAE), ESPECIE ENDÉMICA Y EN PELIGRO DE EXTINCIÓN DE MÉXICO.

“…A partir de que los copépodos y el detritus figuran de manera importante en la dieta, se define como una especie predominantemente carnívora con tendencia epibentófaga y bentófaga. Asimismo, la presencia de copépodos y las especies de cladóceros encontrados (Leydigia y Simocephalus) indican una distribución litoral del pez en biotopos ricos en macrofitas (Villabona-González et al, 2011).…”

Local factors affecting the testate amoeba community (Protozoa: Arcellinida; Euglyphida) in a neotropical floodplain

“…Studies have defined the main characteristics of different communities associated with aquatic macrophytes, revealing the determinative factors of their structures. The high productivity of these plants depends on the physical, chemical, and biological characteristics of the environment, as well as and the influence of floods on the environment's local factors (Agostinho et al, 2007;Lamentowicz et al, 2007;MaiaBarbosa et al, 2008;Thomaz and Cunha, 2010;Villabona-González et al, 2011).…”