Nearby rainforest promotes coffee pollination by increasing spatio-temporal stability in bee species richness
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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Nearby rainforest promotes coffee pollination by increasing spatio-temporal stability in bee species richness. / Klein, Alexandra-Maria.
in: Forest Ecology and Management, Jahrgang 258, Nr. 9, 10.10.2009, S. 1838-1845.Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Nearby rainforest promotes coffee pollination by increasing spatio-temporal stability in bee species richness
AU - Klein, Alexandra-Maria
PY - 2009/10/10
Y1 - 2009/10/10
N2 - Natural tropical forests are highly diverse and are known to contribute to forest-based services such as pollination of nearby crops. Landscape changes cause spatial and temporal bee community changes, but consequences how the community changes affect pollination is not well analyzed. This paper addressesthe effects of rainforest distance and on site flower resources in agro-forests on spatial and temporal variation in pollinator communities and the consequences for coffee pollination. The study was conducted in 24 agro-forests dominated by coffee and cacao in Sulawesi, Indonesia differing in their distance to rainforest margin of the Lore-Lindu National Park and in flower density andits temporal variation. In all agro-forests, (1) transect surveys of the understory were obtained over a five-month period to assess bee community compositional similarity, bee diversity, and the temporal variation in bee diversity; and (2) coffee flower visitors were observed and open and bagged pollinationtreatments conducted over one week of coffee blooming to assess bee diversity and the spatial variation in bee diversity and coffee pollination.Mean number of shared species of the understory ranged between 40 and 60% per agro-forest and was higher in agro-forests nearby the rainforest than in agro-forests with a minimal distance of 500 m isolated from the rainforest. Mean species richness in the understory and in coffee flowers decreasedwith rainforest isolation and increased with flower resource availability. Temporal variation in bee species richness of the understory and spatial variation of the coffee flower-visiting bee species richnessper agro-forest increased with forest distance. The variation in bee species richness decreased the mean and increased the spatial variation in bee-pollinated coffee fruit set per agro-forest.In conclusion, crops grown near intact rainforests and which profit from the pollination by many species may fluctuate less in bee-pollinated fruit set across crop plants than crop plants in isolated agriculture that receive low or even single species pollination services.
AB - Natural tropical forests are highly diverse and are known to contribute to forest-based services such as pollination of nearby crops. Landscape changes cause spatial and temporal bee community changes, but consequences how the community changes affect pollination is not well analyzed. This paper addressesthe effects of rainforest distance and on site flower resources in agro-forests on spatial and temporal variation in pollinator communities and the consequences for coffee pollination. The study was conducted in 24 agro-forests dominated by coffee and cacao in Sulawesi, Indonesia differing in their distance to rainforest margin of the Lore-Lindu National Park and in flower density andits temporal variation. In all agro-forests, (1) transect surveys of the understory were obtained over a five-month period to assess bee community compositional similarity, bee diversity, and the temporal variation in bee diversity; and (2) coffee flower visitors were observed and open and bagged pollinationtreatments conducted over one week of coffee blooming to assess bee diversity and the spatial variation in bee diversity and coffee pollination.Mean number of shared species of the understory ranged between 40 and 60% per agro-forest and was higher in agro-forests nearby the rainforest than in agro-forests with a minimal distance of 500 m isolated from the rainforest. Mean species richness in the understory and in coffee flowers decreasedwith rainforest isolation and increased with flower resource availability. Temporal variation in bee species richness of the understory and spatial variation of the coffee flower-visiting bee species richnessper agro-forest increased with forest distance. The variation in bee species richness decreased the mean and increased the spatial variation in bee-pollinated coffee fruit set per agro-forest.In conclusion, crops grown near intact rainforests and which profit from the pollination by many species may fluctuate less in bee-pollinated fruit set across crop plants than crop plants in isolated agriculture that receive low or even single species pollination services.
KW - Ecosystems Research
KW - Community stability
KW - Forest-based regulating services
KW - Pollination services
KW - Resource heterogeneity
KW - Community stability
KW - Forest-based regulating services
KW - Pollination services
KW - Resource heterogeneity
KW - Biology
KW - Didactics of sciences education
UR - http://www.scopus.com/inward/record.url?scp=70349096302&partnerID=8YFLogxK
U2 - 10.1016/j.foreco.2009.05.005
DO - 10.1016/j.foreco.2009.05.005
M3 - Journal articles
VL - 258
SP - 1838
EP - 1845
JO - Forest Ecology and Management
JF - Forest Ecology and Management
SN - 0378-1127
IS - 9
ER -