منابع مشابه
Effects of insect herbivory on the performance of Larix sibirica in a forest-steppe ecotone
The potential of insects to cause temporary spatial shifts of the forest-steppe borderline was investigated in a case study in the northern Mongolian mountain taiga, where Larix sibirica forests border on montane meadow steppe. Insect herbivores of L. sibirica in northern Mongolia include gypsy moth (Lymantria dispar) and grasshoppers, which defoliate trees. Grasshoppers have (like mice) an add...
متن کاملTree recruitment in the Forest-tundra Ecotone
ACKNOWLEDGEMENTS: This thesis is a product under the International Polar Year (IPY) core project PPS Arctic (http://ppsarctic.nina.no) which was financially supported by the Research Council of Norway via the IPY grant 176065/S30 to A. Hofgaard. I would like to thank my supervisors Lars Söderström (NTNU) and Annika Hofgaard (NINA) for their time and effort in helping me build and structure this...
متن کاملHolocene paleoenvironments in southeastern Minnesota ^ chasing the prairie-forest ecotone
This paper uses a multi-proxy approach involving pollen, plant macrofossils, speleothem isotopes, and alluvial history of streams to reconstruct the history of prairie expansion and contraction along the prairie-forest border of southeastern Minnesota, USA. Early Holocene forests were replaced by prairie along this border, but eastward expansion of prairie stalled for 2000 yr when the prairie-f...
متن کاملExamining shifts in Carabidae assemblages across a forest-agriculture ecotone.
Northeastern U.S. farms are often situated adjacent to forestland due to the heterogeneous nature of the landscape. We investigated how forested areas influence Carabidae diversity within nearby crop fields by establishing transects of pitfall traps. Trapping extended across a forest-agriculture ecotone consisting of maize, an intermediate mowed grass margin, and a forest edge. Carabidae divers...
متن کاملEcotone Hierarchies.
Ecological phenomena are evident over a broad spectrum of space and time scales. Ecotones, being defined as zones of transition between adjacent ecological systems, also must occur over an equally broad spectrum of space and time scales. Scale-dependent constraints influence ecological phenomena and resulting zones of transition; however, in traditional ecotone studies little treatment has been...
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ژورنال
عنوان ژورنال: Biodiversity & Ecology
سال: 2012
ISSN: 1613-9801
DOI: 10.7809/b-e.00098