CEPAVE   05420
CENTRO DE ESTUDIOS PARASITOLOGICOS Y DE VECTORES
Unidad Ejecutora - UE
artículos
Título:
Geographical patterns of Triatominae (Heteroptera: Reduviidae) richness and distribution in the Western Hemisphere
Autor/es:
DINIZ-FILHO JOSÉ ALEXANDRE FELIZOLA ; CECCARELLI SOLEDAD; HASPERUÉ WALDO; RABINOVICH JORGE E.
Revista:
INSECT CONSERVATION AND DIVERSITY
Editorial:
WILEY-LISS, DIV JOHN WILEY & SONS INC
Referencias:
Lugar: New York; Año: 2013 p. 1 - 11
ISSN:
1752-458X
Resumen:
1. Broad-scale spatial patterns in species richness have been widely
investigated with spatial statistics tools in the past few years. The primary goal
of these investigations has been to understand the ecological and evolutionary
processes underlying such patterns. Nevertheless, most of the current (climate)
explanations for these patterns actually rely on the geographical range limits of
species, so that a better understanding of such processes may be achieved by
coupling richness and distribution (niche) models.
2. We analysed the geographical ranges and richness patterns for 115 triato-
mine species in the Neotropics, modelled as a function of 12 environmental
variables expressing alternative hypotheses that have been used to explain rich-
ness gradients. These analyses were based on spatial [spatial eigenvector map-
ping (SEVM)] and non-spatial ordinary least-squares multiple regression
models. The geographical ranges of species were also individually analysed
using a general linear model (GLM). The coefficients of the regression models
for richness and distribution were then compared.
3. Spatial analyses revealed that the unique contributions of spatial eigenvec-
tors and environmental variables to richness were, respectively, equal to 24.2%
and 12.2%, with high coefficient values for temperature, actual evapotranspira-
tion, and seasonality. Similar results were obtained using a GLM, and the mean
GLM coefficients had a relatively high correlation with those obtained with
SEVM (r = 0.586; P < 0.05).
4. Our analyses show that the drivers of Neotropical Triatominae richness
and of its species ranges show a high correlation, although the differences
among the drivers may be important for understanding the emergent proper-
ties (historical processes and species-specific environmental drivers) that
explain richness patterns. Moreover, although our analyses identified an
important role for temperature and temperature seasonality in explaining both
species richness and distributions, other spatially structured environmental
variables and historical factors may explain a large part of the variation in
diversity patterns.