NDLI: Trees outside forests in agricultural landscapes: spatial distribution and impact on habitat connectivity for forest organisms

Content Provider	Springer Nature Link
Author	Rossi, Jean Pierre Garcia, Jacques Roques, Alain Rousselet, Jérôme
Copyright Year	2015
Abstract	Various species of forest trees are commonly used for ornamental purposes and are therefore frequently found in nonforest ecosystems. They constitute an important component of the so-called trees outside forests (TOF). Not much is known, however, about the drivers of TOF spatial distribution either in urbanized or in agricultural landscapes since they are generally absent from forest inventories.The present study focused on the spatial distribution of TOF across agricultural landscapes and their potential role in the dispersal of a forest pest insect, the pine processionary moth, Thaumetopoea pityocampa (PPM).All the TOF belonging to the genera Pinus, Cedrus and Pseudotsuga were considered as potential hosts and inventoried within a 22 × 22 km study window. We fitted a nonstationary Poisson process to the empirical data and used the distance to the nearest building as a covariate.Both empirical and simulated data indicated that TOF associated to human artifacts/urbanized areas constituted the main source of landscape connectivity for the PPM in the open fields under study. Because they do not account for TOF, forest inventories dramatically underestimate landscape connectivity and provide an erroneous picture of the PPM habitat distribution. We conclude that TOF, especially the ornamental component, must be taken into account when it comes to understanding forest insect landscape dynamics or genetics. The omnipresence of TOF also suggests a potentially huge role in pest dispersal and invasive species expansion.
Starting Page	243
Ending Page	254
Page Count	12
File Format	PDF
ISSN	09212973
Journal	Landscape Ecology
Volume Number	31
Issue Number	2
e-ISSN	15729761
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-07-10
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Ornamental trees Pine processionary moth Species expansion Landscape connectivity Trees outside forests Open-field landscape Landscape Ecology Plant Ecology Forestry Management Forestry Ecology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Ecology Nature and Landscape Conservation

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