Relationship between host plant diversity and gall-inducing insects richness in the Brazilian Cerrado [Relações entre a diversidade de plantas hospedeiras e a riqueza de insetos galhadores no Cerrado Brasileiro]
de Araujo W.S.,Institute Pesquisas Ambientais e Acoes Conservacionistas IPAAC |
de Araujo W.S.,Federal University of Goais |
dos Santos B.B.,Federal University of Goais |
Gomes-Klein V.L.,Federal University of Goais
Neotropical Biology and Conservation | Year: 2012
Several hypotheses have been proposed to explain the diversity patterns of gall-inducing insect species. Some of them take into consideration the influence of host plants on these patterns, mainly in relation to plant community richness and composition. In the present study, we intended to answer three questions: (i) Is gall richness dependent of the host plant family size?, (ii) This relationship also occurs for the plant genus size?, and (iii) Does the composition of host taxa influence gall richness? We carried out inventories of gall-inducing insect diversity in different areas of the Cerrado region in the state of Goiás, in the Midwestern Region of Brazil. Gall richness was positively correlated to host plant family size in number of species. Larger families presented higher richness of gall morphotypes, such as Fabaceae, a family that exhibits the highest number of plants in the Cerrado area. Also, plant community composition influenced gall richness and the presence of some super-host taxa incremented gall diversity. Our results indicate that plant community composition may be as determinant of gall-inducing insect species diversity as host plant richness. © 2012 by Unisinos.
Campos F.S.,State University of Santa Cruz |
Campos F.S.,Institute Pesquisas Ambientais e Acoes Conservacionistas IPAAC |
Brito D.,State University of Santa Cruz |
Brito D.,Federal University of Goais |
Sole M.,State University of Santa Cruz
Journal of Herpetology | Year: 2013
Amphibians are the most threatened vertebrate group in the world. One of the conservation strategies most used to preserve threatened species is the establishment of protected areas. We used gap analysis to evaluate whether or not the protected area network of northeastern Brazil safeguards populations of threatened amphibians that occur in this region. Data on species geographical ranges were obtained from the International Union for the Conservation of Nature (IUCN) and were overlapped on the northeastern Brazilian protected area network using ArcGIS 9.3. The threatened amphibians found in northeastern Brazil were represented by remnant populations of Adelophryne baturitensis, Adelophryne maranguapensis, Allobates olfersioides, and Agalychnis granulosa. There are 174 protected areas in the protected area network in northeastern Brazil. The network is made up of 65 strict protection areas (IUCN categories I-II) and 109 sustainable use areas (IUCN categories III-VI). The network corresponds to more than 15 million ha, which equates to about 10% of the region's total area. However, the size of the protected areas along the geographical range of these species doesn't necessarily guarantee their persistence in the future. The main threat to these species is loss of habitat due to deforestation and agricultural expansion. Therefore, the viability of new reserves with a diversity of representative ecosystems in northeastern Brazil may be the best solution to avoid extinction processes in this region. © 2013 Society for the Study of Amphibians and Reptiles.