Leaf decomposition and colonization by aquatic macroinvertebrates in two tropical microcatchments (Manizales, Colombia)

Gutiérrez-López, Alejandra; Meza-Salazar, Ana María; Guevara, Giovany

doi:10.24275/uam/izt/dcbs/hidro/2016v26n3/guevara

Cited by 6 publications

(3 citation statements)

References 30 publications

(33 reference statements)

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“…The higher AMI values of richness and density recorded in the reference and cattle production zones could be linked to the presence of riparian vegetation and its importance in buffering environmental impacts (e.g., Lenat, 1984;Rivera, 2004;Burrdet & Watts, 2009;Egler et al, 2012). However, the stream Reference 2 presented the highest values, which is possibly due to the greater differential contribution of leaf litter from speciose riparian vegetation, producing a greater availability of coarse organic benthic resources in this zone (Gutiérrez-López, Meza-Salazar & Guevara, 2016). It is important to note that the agricultural zone did not have riparian vegetation, which may be the reason for the lowest richness and density values found there, as is the case in other studies (e.g., Lenat, 1984;Lenat & Crawford, 1994;Hepp et al, 2010;Egler et al, 2012).…”

Section: Discussionmentioning

confidence: 88%

Density and diversity of macroinvertebrates in Colombian Andean streams impacted by mining, agriculture and cattle production

Meza-Salazar

Guevara

Gomes-Días

et al. 2020

PeerJ

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Background Mining, agriculture and cattle production are activities that threaten the quality and quantity of water resources in the Colombian Andes. However, many drainage basins in this region have not been subjected to simultaneous evaluation of the impact these activities have on the density, diversity and composition of aquatic macroinvertebrates (AMI). The first two of these ecological variables are expected to decrease drastically from zones with no apparent impact towards areas with anthropogenic activity, which areas with mining will present the most impoverished AMI community. Methods We evaluated the density, diversity and composition dissimilarity of AMI in streams impacted by gold mining, agriculture and cattle production. Two reference streams were also studied. Six benthic samplings were conducted bimonthly (Feb 2014–Feb 2015) using a Surber net. Water samples were taken in order to make environmental evaluation among the aforementioned streams, including hydrological, physicochemical and bacteriological parameters (HPCB). Diversity was evaluated as the effective number of RTUs—recognizable taxonomic units—by comparing the richness, typical diversity, and effective number of the most abundant RTUs. Compositional dissimilarity was examined with nMDS and CCA analysis. Results A total of 7,483 organisms were collected: 14 orders, 42 families and 71 RTUs. Our prediction regarding the density and diversity of AMI (Reference > Cattle production > Agriculture > Mining) was partially fulfilled, since the agriculture-dominated stream presented a more impoverished AMI community than that of the gold mining stream. However, these streams presented lower diversity than the cattle production and reference streams, and the AMI density only differed significantly between one reference stream and the agriculture stream. The AMI composition in the agriculture-dominated stream clearly differed from that of the other streams. Discussion The observation of a more impoverished AMI community in agricultural production areas compared to those with mining or cattle production may reflect the importance of the remaining riparian vegetation, which was scarce at the stream with agricultural activity. Moreover, the low diversity, and mainly the reduced AMI richness, in the agriculture stream coincided with the absence of insect genera are intolerant to deterioration of the biological and physicochemical conditions of the water (e.g. Anacroneuria). Conclusions The results suggest that the local impact of agricultural activities may be of equal or greater magnitude than that of mining in terms of AMI density, diversity and composition, in the Colombian Andean riverscape. Future studies should systematically evaluate, throughout the annual cycle, the relative effects of the productive land use, the remaining native vegetation cover and the consequent changes in the HPCB parameters of the water on AMI communities in Colombian Andean basins.

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Section: Discussionmentioning

confidence: 88%

Density and diversity of macroinvertebrates in Colombian Andean streams impacted by mining, agriculture and cattle production

Meza-Salazar

Guevara

Gomes-Días

et al. 2020

PeerJ

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“…A pesar de los esfuerzos de distintos investigadores para determinar el papel de los macroinvertebrados en la descomposición de la MOPG, los estudios en el trópico siguen siendo pocos comparados con los realizados en Norte América y Europa (Marchant, 1989;Cortés, et al, 1997;Quinn, et al, 2000;Graça, 2001;Waters, et al, 2005). En Colombia los trabajos recientes de diversos investigadores en varias regiones (Guevara, et al, 2008;González, 2009;Eyes-Escalante, et al, 2012;Meza-Salazar, et al, 2012;Gutiérrez-López, et al, 2016), destacan el papel ecológico de los macroinvertebrados acuáticos en la colonización, la descomposición de la hojarasca, el reciclaje de nutrientes, y la transferencia de energía a través de la cadena trófica, así como su valor de bioindicadores de la calidad del agua (Zúñiga-Céspedes, et al, 2018).…”

Section: Introductionunclassified

“…En el departamento de Caldas se conocen pocos trabajos relacionados con la descomposición de hojarasca por macroinvertebrados acuáticos. Hasta ahora las investigaciones se han enfocado en la cuenca del río Chinchiná (Meza-Salazar, et al, 2012;Gutiérrez-López, et al, 2016;Rubio-M., et al, 2016), por lo que es preciso profundizar en el tema debido a la importancia de esta cuenca para la región, ya que ofrece muchos bienes y servicios ambientales para el desarrollo social y económico de la subregión Centro-Sur (Secretaria Técnica de los Pactos, 2012). El objetivo de este estudio fue evaluar la colonización de macroinvertebrados acuáticos en hojas individualizadas y mixtas (1:1) de Tibouchina lepidota y Eucalyptus sp.…”

Section: Introductionunclassified

Macroinvertebrados y pérdida de masa de hojas de Eucalyptus sp. y Tibouchina lepidota en una quebrada altoandina con influencia minera (Manizales, Colombia)

Salazar-Castellanos

Meza-Salazar

Guevara

2020

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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El objetivo de este estudio fue evaluar la colonización de macroinvertebrados y el porcentaje de pérdida de masa seca de hojas de Eucalyptus sp. y Tibouchina lepidota en una quebrada afectada por la actividad minera ubicada en la parte alta de la cuenca del río Chinchiná (Manizales, Colombia). Se seleccionaron dos áreas de muestreo: una reconocida como de referencia al no mostrar evidencia de impactos antropogénicos, y otra con influencia de actividades mineras auríferas. Se utilizaron 192 bolsas con 5 g de hojas senescentes de las especies seleccionadas y de una mezcla (1:1), y se extrajeron cuatro réplicas por punto de muestreo en tiempos predeterminados (+3, 7, 15, 30, 45, 60, 75 y 90 días). Se recolectaron 8.070 individuos distribuidos en ocho órdenes, 24 familias y 34 géneros. En la zona de referencia se obtuvo, comparativamente, una mayor riqueza, densidad y diversidad de macroinvertebrados. Se aspira a que los resultados de este trabajo contribuyen al conocimiento de la dinámica de la colonización de macroinvertebrados acuáticos y su papel en la descomposición de hojas de especies exóticas y nativas en microcuencas altoandinas de Colombia.

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Land-use effects on leaf-litter breakdown in streams in a tropical lowland catchment

Rojas-Castillo,

Kepfer-Rojas,

Jacobsen

2024

Aquat Sci

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The expansion of oil palm and cattle grazing in the tropics continues to alter numerous ecosystem functions. The generated land-use change is potentially impacting stream leaf-litter breakdown, a fundamental process for freshwater ecosystems. To assess the effect of land-use change, we studied breakdown rates of forest (Pachira aquatica, Pouroma aspera, Sloanea ampla, and Hippocratea volubilis) and oil palm (Elaeis guineensis) leaves after a 26-day immersion in streams surrounded by rainforests, grazing lands, or oil palm plantations with and without riparian buffers. In addition, we assessed breakdown drivers by deploying litter bags (248) of two mesh sizes (15 mm and 0.5 mm) allowing or restricting macroinvertebrates’ access (134 coarse-mesh bags and 114 fine-mesh bags). Forest leaf breakdown by microbes (fine-mesh) was lower by 55% in the plantations compared to forests; while microbial oil palm-leaf breakdown was lower by 32% in the unbuffered plantations compared to forests (p < 0.05). Total litter breakdown was lower (p > 0.05) in the plantations but not when these preserved riparian buffers. Litter breakdown was driven primarily by microbes in all land uses except in the buffered plantations, possibly due to increased shredder biomass. These results suggest that oil palm agriculture may decrease microbial stream leaf-litter breakdown, especially in streams with no riparian buffers.

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Leaf decomposition and colonization by aquatic macroinvertebrates in two tropical microcatchments (Manizales, Colombia)

Cited by 6 publications

References 30 publications

Density and diversity of macroinvertebrates in Colombian Andean streams impacted by mining, agriculture and cattle production

Density and diversity of macroinvertebrates in Colombian Andean streams impacted by mining, agriculture and cattle production

Macroinvertebrados y pérdida de masa de hojas de Eucalyptus sp. y Tibouchina lepidota en una quebrada altoandina con influencia minera (Manizales, Colombia)

Land-use effects on leaf-litter breakdown in streams in a tropical lowland catchment

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