Recuperation of theTerra FirmeForest Understory Bird Fauna Eight Years after a Wildfire in Eastern Acre, Brazil

Abstract

The present study evaluated the characteristics of the understory bird fauna of four fragments ofterra firmeforest in eastern Acre, Brazil, that were impacted by wildfires in 2005. The study investigated the species richness and the composition of trophic guilds using mist-netting on eight transects (four in burned plots and four in control plots in the same forest fragments). Eight plots (0.12 ha) were also established parallel to each transect to record the number of live trees (DBH ≥ 10 cm), palms, and dead trees. Bamboo stems were quantified in 0.024 ha subplots. No significant difference was found between burned and control plots in the species richness or abundance of birds, nor was any significant pattern found in the NMDS ordination of the composition of the communities or guilds. The Principal Components Analysis (PCA) found that the burned plots were physiognomically distinct, due principally to the number of bamboo stems and dead trees. Multiple regressions based on the PCA scores and bird species richness and abundance found no significant trends. The findings of the present study indicate that the understory bird assemblage of the areas affected by a single wildfire in 2005 had almost totally recuperated eight years after this event.

Artificial perches for the supply of seeds in a fragmented landscape in southwest Brazilian Amazon

“…Anthropogenic activities cause numerous environmental impacts, reducing continuous areas of native forest and transforming them into isolated fragments through the construction of roads, logging, and wildfires of natural or anthropogenic origin (Guilherme and Cintra 2001;Wade et al 2003;Fearnside 2014;Silva et al 2015). After intensive use, many areas in tropical regions are abandoned due to the loss of fertility and the invasion of weeds (Pejchar et al 2007).…”

Efeitos Da Transição Floresta/Pastagem Sobre a Diversidade De Aves De Sub-Bosque No Sudoeste Da Amazônia

“…O constante declínio de espécies de aves tropicais aumentou rapidamente ao final do século passado, sobretudo em decorrência do aumento do desmatamento (KATTAN et al, 1994). Na Amazônia, os impactos ambientais e a consequente diminuição da biodiversidade estão geralmente associados aos processos antrópicos ligados ao uso da terra, sendo os principais a fragmentação, os incêndios florestais e as atividades agropastoris (GARDNER et al, 2009;PERES et al, 2010;CAVARZERE et al, 2012;MOURA et al, 2013;SILVA et al, 2015;WILKER et al, 2023).…”

Wildfire affects expression of male sexual plumage through suppressed testosterone circulation in a tropical songbird

“…Many factors including seasonal timing and interval of fires, as well as whether species evolved in habitats that historically burn, dictate how organisms are affected by wildfire (Hobson and Schieck 1999, Woinarski 1999, Cox and Widener 2008, Stojanovic et al 2016). Tropical birds are especially vulnerable to the threat of climate change (reviewed by Şekercioĝlu et al 2012), yet few studies have explored how wildfires affect tropical species outside of Amazonian forests (Barlow et al 2002, 2006, Barlow and Peres 2004a, b2004b, Mestre et al 2013, Lemos Da Silva et al 2015). Determining how tropical species respond to environmental disturbances can establish which components of phenology are fixed and which are plastic, which has implications for conservation and improves our understanding of life history evolution.…”