Population dynamics of two amphipod species and its relationship with the aquatic vegetation in a Luján river basin microenvironment (Argentina)
The dynamics of two amphipod species in a freshwater micro-environment was studied. Samples were taken monthly, during a whole year, from Las Flores stream, a Luján river tributary. Hyalella (Mesohyalella) curvispina is a herbivore and feeds mainly on phytobenthos. Hyalella (Mesohyalella) sp. is a H. (M.) curvispina predator and uses macrophytes as a refuge. Periphyton algal biomass reaches its maximum during June, the phytobenthos biomass reaches its maximum during October, and macrophyte biomass reaches its maximum between November and February. H. (M.) curvispina shows its maximum density (1267 individuals/m2) and its highest secondary production (2225 mg.m-2.month-1) in October coinciding with the phytobenthosí peak in biomass; its density correlates positively with phytobenthos abundance. H. (M.) sp. density (7067 individuals/m2) and secondary production (1018 mg.m-2.month-1) both peak in January. H. (M.) curvispina density is positively correlated with phytobenthos biomass. H. (M.) sp. density, biomass and secondary production are all positively correlated with macrophyte biomass.
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Asociación Argentina de Ecología
2001
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rev-ecoaus-article-15722021-01-12T22:54:40Z Population dynamics of two amphipod species and its relationship with the aquatic vegetation in a Luján river basin microenvironment (Argentina) Dinámica poblacional de dos especies de anfípodos y su relación con la vegetación acuática en un microambiente de la cuenca del río Luján (Argentina) Casset, María A. Momo, Fernando R. Giorgi, Adonis D. N. The dynamics of two amphipod species in a freshwater micro-environment was studied. Samples were taken monthly, during a whole year, from Las Flores stream, a Luján river tributary. Hyalella (Mesohyalella) curvispina is a herbivore and feeds mainly on phytobenthos. Hyalella (Mesohyalella) sp. is a H. (M.) curvispina predator and uses macrophytes as a refuge. Periphyton algal biomass reaches its maximum during June, the phytobenthos biomass reaches its maximum during October, and macrophyte biomass reaches its maximum between November and February. H. (M.) curvispina shows its maximum density (1267 individuals/m2) and its highest secondary production (2225 mg.m-2.month-1) in October coinciding with the phytobenthosí peak in biomass; its density correlates positively with phytobenthos abundance. H. (M.) sp. density (7067 individuals/m2) and secondary production (1018 mg.m-2.month-1) both peak in January. H. (M.) curvispina density is positively correlated with phytobenthos biomass. H. (M.) sp. density, biomass and secondary production are all positively correlated with macrophyte biomass. Se estudió la dinámica anual de las poblaciones de dos especies de anfípodos en un microambiente de agua dulce del arroyo Las Flores, afluente del río Luján. Hyalella (Mesohyallela) curvispina es un anfípodo herbívoro que se alimenta principalmente de las algas del fitobentos; Hyalella (Mesohyalella) sp. utiliza como refugio a las plantas macrófitas acuáticas y es un carnívoro depredador de Hyalella (M.) curvispina. Las comunidades vegetales del arroyo siguen una dinámica escalonada a lo largo del año, con un máximo de perifiton en junio, de fitobentos en octubre y de macrófitas entre noviembre y febrero. H. (M.) curvispina tiene su mayor densidad (1267 individuos/m2) y su producción secundaria más alta (2225 mg.m-2.mes-1) en coincidencia con el pico de fitobentos de octubre, con cuya abundancia se correlaciona positivamente. Hyalella (Mesohyalella) sp. presenta su abundancia máxima (7067 individuos/m2) y su mayor producción secundaria (1018 g.m-2.mes-1) en enero; ambas cantidades se correlacionan positivamente con la biomasa de macrófitas en el ambiente. Asociación Argentina de Ecología 2001-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículos application/pdf https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1572 Ecología Austral; Vol. 11 No. 2 (2001); 079-085 Ecología Austral; Vol. 11 Núm. 2 (2001); 079-085 0327-5477 1667-7838 spa https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1572/906 Derechos de autor 2021 Ecología Austral |
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Asociación Argentina de Ecología |
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spa |
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Digital |
| author |
Casset, María A. Momo, Fernando R. Giorgi, Adonis D. N. |
| spellingShingle |
Casset, María A. Momo, Fernando R. Giorgi, Adonis D. N. Population dynamics of two amphipod species and its relationship with the aquatic vegetation in a Luján river basin microenvironment (Argentina) |
| author_facet |
Casset, María A. Momo, Fernando R. Giorgi, Adonis D. N. |
| author_sort |
Casset, María A. |
| title |
Population dynamics of two amphipod species and its relationship with the aquatic vegetation in a Luján river basin microenvironment (Argentina) |
| title_short |
Population dynamics of two amphipod species and its relationship with the aquatic vegetation in a Luján river basin microenvironment (Argentina) |
| title_full |
Population dynamics of two amphipod species and its relationship with the aquatic vegetation in a Luján river basin microenvironment (Argentina) |
| title_fullStr |
Population dynamics of two amphipod species and its relationship with the aquatic vegetation in a Luján river basin microenvironment (Argentina) |
| title_full_unstemmed |
Population dynamics of two amphipod species and its relationship with the aquatic vegetation in a Luján river basin microenvironment (Argentina) |
| title_sort |
population dynamics of two amphipod species and its relationship with the aquatic vegetation in a luján river basin microenvironment (argentina) |
| description |
The dynamics of two amphipod species in a freshwater micro-environment was studied. Samples were taken monthly, during a whole year, from Las Flores stream, a Luján river tributary. Hyalella (Mesohyalella) curvispina is a herbivore and feeds mainly on phytobenthos. Hyalella (Mesohyalella) sp. is a H. (M.) curvispina predator and uses macrophytes as a refuge. Periphyton algal biomass reaches its maximum during June, the phytobenthos biomass reaches its maximum during October, and macrophyte biomass reaches its maximum between November and February. H. (M.) curvispina shows its maximum density (1267 individuals/m2) and its highest secondary production (2225 mg.m-2.month-1) in October coinciding with the phytobenthosí peak in biomass; its density correlates positively with phytobenthos abundance. H. (M.) sp. density (7067 individuals/m2) and secondary production (1018 mg.m-2.month-1) both peak in January. H. (M.) curvispina density is positively correlated with phytobenthos biomass. H. (M.) sp. density, biomass and secondary production are all positively correlated with macrophyte biomass. |
| publisher |
Asociación Argentina de Ecología |
| publishDate |
2001 |
| url |
https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1572 |
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