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No. de sistema: 000002656

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 160412m20169999xx^^r^p^^^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
044 _ _ a| xx
245 0 0 a| Stability vs. organization
b| potential of a trophic model for the management of shallow tropical streams
506 _ _ a| Acceso electrónico sólo para usuarios de ECOSUR
520 1 _ a| Streams in the Hondo River basin (Mexico–Belize) face ecological disturbances caused by use of fertilizers and pesticides, as well as invasion by exotic species. These threats can affect ecosystem functioning, with loss of biotic integrity. Mass-balance trophic models were developed to quantify the energy flow and assess the maturity and health states for three locations in the basin, in two seasons. Quantitative sampling was carried out for plankton, fish, macrobenthos, insects, benthic autotrophs, detritus, and exported organic matter. Field sampling was supplemented with a literature review to define functional groups and their diets. Results showed that more than 50% of the energy flow originated from detritus, which suggests that the systems are bottom-up controlled. Low values of energy transfer efficiency, connectivity, omnivory, recycling, mean path length, and ascendency suggest that the freshwater bodies in this basin are oligotrophic, but they are not in a good health and thus have low stability and are susceptible to disturbance, despite the fact that they also have a high number of specialized functional groups, indicative of a well-organized food web, supposed to be representative of healthy ecosystems. The potential of these models to manage shallow tropical streams is discussed.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Contaminación de ríos
650 _ 4 a| Intercambio de energía
650 _ 4 a| Grupo funcional
650 _ 4 a| Salud de los ecosistemas
650 _ 4 a| Disturbio ecológico
651 _ 4 a| Cuenca del Río Hondo
700 1 _ a| Ruiz Cauich, Lissie Edith
700 1 _ a| Schmitter Soto, Juan Jacobo
c| Doctor
e| coaut.
700 1 _ a| Barba Macías, Everardo
c| Dr.
e| coaut.
n| 16678693600
700 1 _ a| González Solís, David
e| coaut.
773 0 _
t| Food Webs
g| Vol. 6 (March 2016), p. 38–47
x| 2352-2496
901 _ _ a| Artículo con arbitraje
902 _ _ a| GOG / MM
904 _ _ a| Abril 2016
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Agua
905 _ _ a| Biblioelectrónica
LNG eng
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Stability vs. organization: potential of a trophic model for the management of shallow tropical streams
Ruiz Cauich, Lissie Edith (autor)
Schmitter Soto, Juan Jacobo (autor)
Barba Macías, Everardo (autor)
González Solís, David (autor)
Nota: Acceso electrónico sólo para usuarios de ECOSUR
Contenido en: Food Webs. Vol. 6 (March 2016), p. 38–47. ISSN: 2352-2496
No. de sistema: 2656
Tipo: - Artículo con arbitraje
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Inglés

"Streams in the Hondo River basin (Mexico–Belize) face ecological disturbances caused by use of fertilizers and pesticides, as well as invasion by exotic species. These threats can affect ecosystem functioning, with loss of biotic integrity. Mass-balance trophic models were developed to quantify the energy flow and assess the maturity and health states for three locations in the basin, in two seasons. Quantitative sampling was carried out for plankton, fish, macrobenthos, insects, benthic autotrophs, detritus, and exported organic matter. Field sampling was supplemented with a literature review to define functional groups and their diets. Results showed that more than 50% of the energy flow originated from detritus, which suggests that the systems are bottom-up controlled. Low values of energy transfer efficiency, connectivity, omnivory, recycling, mean path length, and ascendency suggest that the freshwater bodies in this basin are oligotrophic, but they are not in a good health and thus have low stability and are susceptible to disturbance, despite the fact that they also have a high number of specialized functional groups, indicative of a well-organized food web, supposed to be representative of healthy ecosystems. The potential of these models to manage shallow tropical streams is discussed."


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