Boundary Dynamics: A Conceptual Framework for Studying Landscape Ecosystems

Influence of invasive palms on terrestrial arthropod assemblages in desert spring habitat

“…Vacuum collection effort is 20 consistent because of constant velocity, and the nozzle and suction can penetrate into the 21 interior of a complex canopy (Buffington and Redak, 1998). 22 We used a Craftsman blower/vacuum, similar to the apparatus of Stewart and Wright 23 (1995), with an 11 cm aperture modified with a nylon 0.25mm square mesh collecting 1 chamber inserted in the intake tube. Both Stewart and Wright's (1995) pitot tube 2 measurements and our estimates with an anemometer indicate velocities well in excess of the 3 minimum velocities required for successful extraction of arthropods from vegetation 4 (Southwood, 1978).…”

Broad-Scale Assessment of Rangeland Health, Grand Staircase–Escalante National Monument, USA

“…Configuration or the pattern of habitats within the landscape influences processes such as the spread of disturbance, predation, and dispersal of wildlife (Wiens et al 1986). Increased fragmentation in the landscape was correlated with increased invasion by cheatgrass into sagebrush patches, which subsequently facilitates fire spread, loss of sagebrush, and conversion to annual grasslands .…”

Characterization of pesticide consumption in the county of Santarém, Pará, Brazil

“…On the other hand, várzeas represent an important and sensitive part of the Amazonian eco system because they constitute a boundary between terrestrial and aquatic environments (de Mérona, 1993). They shelter a huge array of organisms, which belong to both biomes, that are often in close inter action (Wiens et al, 1985). The us age of pesticides in this environment may harm some sensitive species, con sequently affecting the trophic flux or ecological processes.…”