INVESTIGADORES
BERKUNSKY Igor
artículos
Título:
Site-occupancy modelling: A new approach to assess sensitivity of indicator species
Autor/es:
CORTELEZZI, AGUSTINA; ARMENDARIZ, LAURA; SIMOY, MARÍA VERÓNICA; MARINELLI, CLAUDIA B; CEPEDA, ROSANA E; RODRIGUES CAPÍTULO ALBERTO; BERKUNSKY, IGOR
Revista:
ECOLOGICAL INDICATORS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2017 vol. 79 p. 191 - 195
ISSN:
1470-160X
Resumen:
One of the most challenging aspects of quality indices has been to compile reliable measures of the species?sensitivity to various magnitudes and different kinds of ecosystem attributes. Occupancy modelling has becomeincreasingly useful to ecologists because provides a flexible framework to estimate the habitat use as a functionof site information. We modelled occupancy of oligochaete species from physicochemical variables of Pampeanstreams; and we described the change in occupancy along the gradient of each explanatory physicochemicalvariable. We proposed three phases (resistance, tolerance and extinction) to describe the sensitivity of the speciesin terms of occupancy. Seventeen of the 33 taxa of oligochaetes were enough abundant to be modeled. In eightspecies, we obtained a total of 11 different models including physicochemical covariates. Occupancy wasexplained by conductivity in four species, by dissolved oxygen in three species, and by nutrients in four species.The analysis of phases (resistance, tolerance and extinction) to describe the sensitivity of the species in terms ofoccupancy, offers a new methodology to understand how the species behave along a stressor gradient. Detaileddescriptions of sensitivity of these local species, will helps ecologists to generate more accurate biotic indices.