Successional changes in cerradao and cerrado/ forest ecotonal
vegetation in western Sao Paulo State, Brazil, 1962-2000.
While agreste represents the easternmost ecotonal
areas (to the Atlantic Forest) and arboreal caatinga represents the southernmost ecotone (to the Cerrado), Campo Maior represents the westernmost ecotone of the CPD.
Bull (1991) summarized the mechanisms most commonly responsible for maintaining parapatric boundaries of nonhybridizing species which included ecotonal
changes, interspecific competition, predation, parasites and disease, and reproductive interference.
Biorefuges within these Watersheds are, holistically considered, identified overall as comparatively diverse, subsurface wetted ecotonal
Essas por sua vez deverao ser em numero que abranja as linhas perimetrais e os vetores de tensao ecotonal
, evolucao do modelado (por influencia hidrologica), os processos periculares e a susceptibilidade a fenomenos de amplificacao.
Both the harsh climatic conditions (very Arctic-like in character, especially in wintertime) and the surprisingly diverse faunal resources of the region (sea mammals, land mammals, fish and avian species), including typically Arctic animals as well as more Subarctic species, reflect the ecotonal
setting that the Lowlands occupy (Cooch 1968, MacPherson 1968, Mansfield 1968, Russell 1975, Scott and Crossman 1973, Sergeant 1968).
Forest edges result from differences in the physical conditions (such as wind and light intensity and quality, among many others) at the ecotonal
areas that alter the microclimate and thus the biological entities within it.
Por ejemplo, la presencia de los cinturones de niebla que circundan la sierra del Doctor en franjas altitudinales de entre 1000 y 2200 m (Martorell y Ezcurra, 2002) estan asociados al matorral submontano, comunidad vegetal ecotonal
que se establece entre los matorrales xerofilos y los bosques templados.
In our study, no significant differences were found in biomineralization percentages (total and partial) of samples from different Fuegian ecotonal
sites which differed in humidity, topography, soil, exposition and grazing rates.
En cualquier caso se trata de una situacion ecotonal
que merecera la pena abordar en el futuro, a medida que se vaya clarificando el panorama sintaxonomico de los bosques de Chile Central.
Prior to the expansion of the EMA, cow and neonate elk selected areas characterized as ecotonal
between deciduous forest and herbaceous openings (DeVivo 2009).
demonstrating the unique ecotonal
position of the site between the beech-maple and western mesophytic forest associations (Braun 1950) and a diversity of forest community types in relation to local physical-environmental conditions and human-historical processes (Medley and Krisko 2007).