Grupos funcionales alimentarios de macroinvertebrados acuáticos en el río Gaira, Colombia
Functional feeding groups of macroinvertebrates in Gaira river, Colombia. Tropical rivers are frequently described on their biodiversity but few studies have considered the ecological value of this richness in their food webs. We determined the trophic structure of aquatic macroinvertebrate communit...
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Universidad de Costa Rica
2011
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/3418 |
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RBT34182022-06-06T18:59:48Z Grupos funcionales alimentarios de macroinvertebrados acuáticos en el río Gaira, Colombia Rodríguez-Barrios, Javier Ospina-Tórres, Rodulfo Turizo-Correa, Rodrigo aquatic macroinvertebrates food functional groups functional units tropical stream mountain biomass macroinvertebrados acuáticos grupos funcionales alimentarios unidades funcionales río tropical de montaña biomasa Functional feeding groups of macroinvertebrates in Gaira river, Colombia. Tropical rivers are frequently described on their biodiversity but few studies have considered the ecological value of this richness in their food webs. We determined the trophic structure of aquatic macroinvertebrate communities (expressed in the richness and abundance of taxa and biomass proportions of different functional feeding groups) at the level of the river, stretch and microhabitats (functional units - UFs). We evaluated the spatial and temporal variation of these descriptors during wet and dry events, and selected three sites associated with different altitudinal belts. We reported 109 taxa, with 11 167 individuals who contributed 107.11g of biomass. Density of macroinvertebrates was favored with increasing height, and biomass showed the opposite pattern (K-W=10.1, d.f.=1, p < 0.05), due to the addition of large crustaceans (Macrobrachium), and the taxa diversity was higher in the middle stretch of the river (H?=3.16). The Gaira stream runs through a mid-sized river basin, for this reason we found mainly bedrock (epilithon=50.5%), gravel and sand (43.7%). The functional unit with more habitat and food resources that contains a higher abundance of leaf litter macroinvertebrates was foliage followed by epilithon, fine sediment and gravel-sand (K-W=25.3, d.f.=3, p < 0.05). The biomass values of these organisms were higher in leaves followed by gravel-sands, epilithon and sediment (K-W=15.3, d.f.=3, p < 0.05). Autochthonous biomass input by different functional feeding groups can be considered very low, but they define the functionality of the stream, being represented almost exclusively by shredders (Macrobrachium, 73%), present only in the lower reaches, followed by shredder Leptonema with 15%, located mostly in the upper reaches and predatory stoneflies of the genus Anacroneuria to 6.56%, which dominated in the middle stretch of stream. Excluding Macrobrachium from the analysis, there was dominance of Anacroneuria in the lower reaches. Between rainfall and drought events, biomass of functional feeding groups was higher in rain (W=10.1, d.f.=1, p < 0.05), favoring the growth of decapods, but the abundance was much higher during drought events. Universidad de Costa Rica 2011-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/3418 10.15517/rbt.v59i4.3418 Revista de Biología Tropical; Vol. 59 No. 4 (2011): Volume 59 – Regular number 4 – December 2011; 1537–1552 Revista de Biología Tropical; Vol. 59 Núm. 4 (2011): Volumen 59 – Número regular 4 – Diciembre 2011; 1537–1552 Revista Biología Tropical; Vol. 59 N.º 4 (2011): Volume 59 – Regular number 4 – December 2011; 1537–1552 2215-2075 0034-7744 10.15517/rbt.v59i4 spa https://revistas.ucr.ac.cr/index.php/rbt/article/view/3418/3322 Copyright (c) 2011 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
spa |
| format |
Online |
| author |
Rodríguez-Barrios, Javier Ospina-Tórres, Rodulfo Turizo-Correa, Rodrigo |
| spellingShingle |
Rodríguez-Barrios, Javier Ospina-Tórres, Rodulfo Turizo-Correa, Rodrigo Grupos funcionales alimentarios de macroinvertebrados acuáticos en el río Gaira, Colombia |
| author_facet |
Rodríguez-Barrios, Javier Ospina-Tórres, Rodulfo Turizo-Correa, Rodrigo |
| author_sort |
Rodríguez-Barrios, Javier |
| description |
Functional feeding groups of macroinvertebrates in Gaira river, Colombia. Tropical rivers are frequently described on their biodiversity but few studies have considered the ecological value of this richness in their food webs. We determined the trophic structure of aquatic macroinvertebrate communities (expressed in the richness and abundance of taxa and biomass proportions of different functional feeding groups) at the level of the river, stretch and microhabitats (functional units - UFs). We evaluated the spatial and temporal variation of these descriptors during wet and dry events, and selected three sites associated with different altitudinal belts. We reported 109 taxa, with 11 167 individuals who contributed 107.11g of biomass. Density of macroinvertebrates was favored with increasing height, and biomass showed the opposite pattern (K-W=10.1, d.f.=1, p < 0.05), due to the addition of large crustaceans (Macrobrachium), and the taxa diversity was higher in the middle stretch of the river (H?=3.16). The Gaira stream runs through a mid-sized river basin, for this reason we found mainly bedrock (epilithon=50.5%), gravel and sand (43.7%). The functional unit with more habitat and food resources that contains a higher abundance of leaf litter macroinvertebrates was foliage followed by epilithon, fine sediment and gravel-sand (K-W=25.3, d.f.=3, p < 0.05). The biomass values of these organisms were higher in leaves followed by gravel-sands, epilithon and sediment (K-W=15.3, d.f.=3, p < 0.05). Autochthonous biomass input by different functional feeding groups can be considered very low, but they define the functionality of the stream, being represented almost exclusively by shredders (Macrobrachium, 73%), present only in the lower reaches, followed by shredder Leptonema with 15%, located mostly in the upper reaches and predatory stoneflies of the genus Anacroneuria to 6.56%, which dominated in the middle stretch of stream. Excluding Macrobrachium from the analysis, there was dominance of Anacroneuria in the lower reaches. Between rainfall and drought events, biomass of functional feeding groups was higher in rain (W=10.1, d.f.=1, p < 0.05), favoring the growth of decapods, but the abundance was much higher during drought events. |
| title |
Grupos funcionales alimentarios de macroinvertebrados acuáticos en el río Gaira, Colombia |
| title_short |
Grupos funcionales alimentarios de macroinvertebrados acuáticos en el río Gaira, Colombia |
| title_full |
Grupos funcionales alimentarios de macroinvertebrados acuáticos en el río Gaira, Colombia |
| title_fullStr |
Grupos funcionales alimentarios de macroinvertebrados acuáticos en el río Gaira, Colombia |
| title_full_unstemmed |
Grupos funcionales alimentarios de macroinvertebrados acuáticos en el río Gaira, Colombia |
| title_sort |
grupos funcionales alimentarios de macroinvertebrados acuáticos en el río gaira, colombia |
| publisher |
Universidad de Costa Rica |
| publishDate |
2011 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/3418 |
| work_keys_str_mv |
AT rodriguezbarriosjavier gruposfuncionalesalimentariosdemacroinvertebradosacuaticosenelriogairacolombia AT ospinatorresrodulfo gruposfuncionalesalimentariosdemacroinvertebradosacuaticosenelriogairacolombia AT turizocorrearodrigo gruposfuncionalesalimentariosdemacroinvertebradosacuaticosenelriogairacolombia |
| _version_ |
1810114515264602112 |