Effects of habitat structural complexity on diversity patterns of neotropical fish assemblages in the Bita River Basin, Colombia

Montoya-Ospina, Diana Carolina; López-Delgado, Edwin Orlando; Hevia, Violeta; Villa‐Navarro, Francisco A.

doi:10.1016/j.limno.2019.125743

Cited by 4 publications

(1 citation statement)

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“…Currently, one of the challenges of ecology and conservation biology is to understand the factors that determine the richness, abundance, and distribution of species in megadiverse regions (Arrington and Winemiller, 2005), due to the crisis of biodiversity loss produced by anthropogenic impacts (Cardinale et al, 2012;Montoya-Ospina, López-Delgado, Hevia, Villa-Navarro, 2020). For the Colombian Orinoquia, most of the studies on fish communities have focused on the surveying (Urbano-Bonilla et al, 2009;Ramírez-Gil et al, 2011;Villa-Navarro et al, 2011;Maldonado-Ocampo et al, 2013;Urbano-Bonilla et al, 2014;Usma et al, 2016;Zamudio et al, 2017;Urbano-Bonilla et al, 2018), and a few studies have focused on fish assemblages, based on habitat structural complexity (Montoya-Ospina et al, 2020;Lasso et al, 2021) and temporality (Ospina-O, Bedoya-Giraldo, Villa-Navarro, 2021). Therefore, the objective of this study was to describe the fish assemblage of the Mitimiti stream and test the hypothesis that they vary at a spatial and temporal level.…”

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confidence: 99%

Fish diversity of a tributary of the Meta River, in the flat highlands of the colombian Orinoquia

Cortés Hernández,

Suarez Contento,

Baquero

et al. 2023

AZL

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The distribution and abundance of fish for the Orinoco River basin drainages are influenced by hydrometric seasonality and the structural complexity of the habitat, so understanding how fish assemblages are structured on a temporal and spatial scale is essential for biological conservation. Therefore, the purpose of this study was to describe the fish assemblage for the Mitimiti stream and test the hypothesis of spatial and temporal variation. To do this, collections were made at four sampling stations on the Mitimiti stream, during three contrasting rainfall seasons, with the help of a 10 m x 1.5 m trawl net and a 2 mm mesh eye. The diversity of fish assemblages was analyzed using Hill numbers, abundance-based dissimilarity, and a Canonical Correspondence Analysis (CCA). In total, 2493 individuals and 115 species were recorded, where the orders with the highest dominance were Characiformes and Blenniiformes. Regarding the diversity of order q = 0, no significant differences were found between the hydrological periods and the sampling stations, however, the low water period and St3 exhibited the highest species richness. The most dissimilar hydrological period was the high water season and the variables that significantly influenced fish assemblage were water temperature (p = 0.02) and dissolved oxygen (p = 0.05).

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