Indices of β‐diversity are of two major types,(1) those that measure among‐plot variability in
species composition independently of the position of individual plots on spatial or …

Second growth has replaced lowland forest in many parts of the Neotropics, providing
valuable habitat for many resident and migrant bird species. Given the prevalence of such …

Species diversity and community composition of birds change rapidly along elevational
gradients in Costa Rica. Such changes are of interest ecologically and illustrate the value of …

Summary 1 Understanding how species in a diverse regional pool are spatially distributed
with respect to habitat types is a longstanding problem in ecology. Tropical species are …

The Monteverde Cloud Forest Reserve has captured the worldwide attention of biologists,
conservationists, and ecologists and has been the setting for extensive investigation over …

Watershed budget studies at the Hubbard Brook Experimental Forest (HBEF), New
Hampshire, USA, have demonstrated high calcium depletion of soil during the 20th century …

Existing protected areas in Costa Rica were compared with Holdridge Life Zones to assess
their coverage of biodiversity. The analysis revealed that only nine of the 23 life zones or …

Bird surveys are among the most widely used biodiversity inventories and serve as the basis
for an increasing proportion of pure and applied ecological research. It is rarely possible to …

Identifying high‐quality habitat is integral to effective species conservation efforts and
requires information about habitat‐specific abundance and demographics. This information …

Observations of hummingbirds feeding at flowers longer or shorter than their bills seem to
contradict the view that bill lengths of hummingbirds evolved in concert with the lengths of …