A Comparison of Avian Diversity in Spruce Monocultures and Spruce-Birch Polycultures in Southern Sweden. Felton, A., Andersson, E., Ventorp, D., & Lindbladh, M. Silva Fennica, 45(5):1143–1150, 2011. abstract bibtex The replacement of some spruce monocultures with stands composed of planted Norway spruce ( Picea abies ) and naturally regenerated birch ( Betula spp.) has a range of potential benefits, but the implications for biodiversity are generally unknown. Here we conduct a paired replicated study in southern Sweden of the avian biodiversity found within Norway spruce monocultures, and within Norway spruce stands possessing approximately 20\,% birch. Our research leads us to three findings. First, avian diversity was significantly higher in the spruce-birch polycultures. Second, spruce-birch polycultures exclusively attracted broadleaf- associated bird species and retained the majority of conifer-associated bird species found in the spruce monocultures. Third, avian biodiversity within the spruce-birch polycultures did not incorporate threatened taxa. We suggest that in addition to the apparent benefits for stand level diversity, widespread use of spruce-birch polycultures could provide a means of softening the matrix for broadleaved-associated species, while concurrently providing an increased broadleaf base from which future conservation actions could be implemented. Our results are relevant to multi-use forestry, and recent policy initiatives by forest certification agencies which aim to increase broadleaf-associated biodiversity within conifer-dominated production forest landscapes.
@article{feltonComparisonAvianDiversity2011,
title = {A Comparison of Avian Diversity in Spruce Monocultures and Spruce-Birch Polycultures in Southern {{Sweden}}},
author = {Felton, Adam and Andersson, Erik and Ventorp, David and Lindbladh, Matts},
year = {2011},
volume = {45},
pages = {1143--1150},
issn = {0037-5330},
abstract = {The replacement of some spruce monocultures with stands composed of planted Norway spruce ( Picea abies ) and naturally regenerated birch ( Betula spp.) has a range of potential benefits, but the implications for biodiversity are generally unknown. Here we conduct a paired replicated study in southern Sweden of the avian biodiversity found within Norway spruce monocultures, and within Norway spruce stands possessing approximately 20\,\% birch. Our research leads us to three findings. First, avian diversity was significantly higher in the spruce-birch polycultures. Second, spruce-birch polycultures exclusively attracted broadleaf- associated bird species and retained the majority of conifer-associated bird species found in the spruce monocultures. Third, avian biodiversity within the spruce-birch polycultures did not incorporate threatened taxa. We suggest that in addition to the apparent benefits for stand level diversity, widespread use of spruce-birch polycultures could provide a means of softening the matrix for broadleaved-associated species, while concurrently providing an increased broadleaf base from which future conservation actions could be implemented. Our results are relevant to multi-use forestry, and recent policy initiatives by forest certification agencies which aim to increase broadleaf-associated biodiversity within conifer-dominated production forest landscapes.},
journal = {Silva Fennica},
keywords = {*imported-from-citeulike-INRMM,~INRMM-MiD:c-13514345,betula-spp,picea-abies,plantation,sweden},
lccn = {INRMM-MiD:c-13514345},
number = {5}
}
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