Diversidade de formigas (Hymenoptera: Formicidae) da serapilheira em eucaliptais (Myrtaceae) e área de cerrado de Minas Gerais

Abstract

0.05). It has been demonstrated that most of the species found in native vegetation occur also in the eucalypt plantations, although these ones present a drastic diminution of the species density, suggesting that the ant regional richness do not depend on the complexity of the habitat, because the cerrado ant fauna is well conserved in the eucalypt plantations, contradicting most of the literature on this subject.]]>

Riqueza de formigas (Hymenoptera, Formicidae) da serapilheira em fragmentos de floresta semidecídua da Mata Atlântica na região do Alto do Rio Grande, MG, Brasil

“…II) da riqueza observada nestes remanescentes. MARINHO et al (2002) encontraram uma alta riqueza de formigas em vegetação nativa, comparando com áreas de eucaliptais em diferentes idades, mostrando que ambientes mais complexos favorecem uma alta riqueza.…”

“…Alguns trabalhos têm avaliado a utilização de formigas como indicadores da qualidade ambiental ou de diversidade de espécies nas comunidades (KASPARI & MAJER, 2000;ALONSO, 2000;MARINHO et al, 2002;RAMOS et al, 2003) e efeito da fragmentação sobre a comunidade de formigas (CARVALHO & VASCONCELOS, 1999;VASCONCELOS et al, 2001). O levantamento das espécies nos diferentes fragmentos de floresta nativa pode caracterizar o impacto do processo de fragmentação sobre a diversidade destes insetos, por serem consideradas um bom grupo testemunho das conseqüências desses impactos.…”

A comparison of the leaf-litter ant fauna in a secondary atlantic forest with an adjacent pine plantation in southeastern Brazil

“…Previous studies have described how afforestation methods using a single tree species can have a marked negative effect on ant species richness and composition (Majer & Recher 1999Watt et al 2002; the reduction in ant diversity that occurs when original forests are replaced by monocultures has also been verifi ed in Brazil (Oliveira et al 1995, Tavares et al 2001, Marinho et al 2002. In the pine tree forests of the Patagonian steppe (Corley et al 2006) or south eastern Australia (Sinclair & New 2004), ant abundance within pine plantations is lower and species composition signifi cantly impoverished when compared to more pristine habitats.…”

Are ant assemblages of Brazilian veredas characterised by location or habitat type?

“…In their early stages, such plantations consume large amounts of water and nutrients (Vezzani et al, 2001;Vital, 2007), and in later stages the litter becomes rich in chemical compounds that slow down its degradation, leading to reduced cycling of nutrients and impoverishment of soil. The scale of these impacts in the veredas is not well understood, but is it in other cerrado phytophysiognomies (Marinho et al, 2002;Tavares et al, 2008). There is an urgent need for studies to assist with conservation measures and to help with the drafting of complementary laws that aim to protect this unique ecosystem in the light of novel land usage policies.…”