De Koning, G. H. J.

[["dc.bibliographiccitation.firstpage","59"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Diversity and Distributions"],["dc.bibliographiccitation.lastpage","68"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Lozada, Tannya"],["dc.contributor.author","Koning, G. H. J. de"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:49:58Z"],["dc.date.available","2017-09-07T11:49:58Z"],["dc.date.issued","2009"],["dc.description.abstract","Biodiversity patterns may be influenced by the species geographical range sizes, but this is rarely shown. We used a highly replicated and large-scale study in coastal Ecuador to determine for the first time the importance of latitudinal range size of plant species in their response to land-use activities. We examined herbaceous plant communities of five land-use types with decreasing anthropogenic disturbance (from the most intervened rice and pasture to the less intervened managed agroforest, abandoned agroforest, and forest) in a low and a high impact human-dominated landscape. All species were classified in four latitudinal range size quartiles, from the 25% species with the narrowest to the 25% with the widest range size. We found notable differences between patterns of total species richness and those of individual range size quartiles. Whereas total species richness was higher in more intervened land-use types, percentages of narrow-ranged species were significantly higher in less intervened land-use types. In contrast, percentages of wide-ranging species were higher in more intervened land-use types. Hence, responses of plant species to human activities were influenced by traits that determine their range sizes. An analysis of floristic similarity between land-use types revealed that narrow-ranged species were mainly preserved in forest fragments, but the other land-use types supported many unique narrow-ranged species and therefore made an important contribution to their preservation at the landscape level. Conservation efforts should combine protection of natural habitats with strategies to maintain a diversity of low-intensity land-use types, looking for win-win solutions or trade-offs between biodiversity conservation and human welfare in human-dominated landscapes."],["dc.identifier.doi","10.1111/j.1472-4642.2007.00413.x"],["dc.identifier.gro","3149798"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6496"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","1366-9516"],["dc.subject","Chocó biogeographical region; disturbance; biodiversity; land-use management; endemism; Ecuador"],["dc.title","Geographical range size of tropical plants influences their response to anthropogenic activities"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","131"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Perspectives in Plant Ecology, Evolution and Systematics"],["dc.bibliographiccitation.lastpage","140"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Lozada, Tannya"],["dc.contributor.author","Koning, G. H. J. de"],["dc.contributor.author","Marché, Raphael"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:53:53Z"],["dc.date.available","2017-09-07T11:53:53Z"],["dc.date.issued","2007"],["dc.description.abstract","We used a highly replicated study to examine vegetation characteristics between patches of intervened forest, abandoned agroforestry systems with coffee and actively managed agroforestry systems with coffee in a tropical landscape. In all habitats, plant structural characteristics, individual abundance, species richness and composition were recorded for the three plant size classes: adult trees, saplings and seedlings. Furthermore, bird species richness and composition, and seeds dispersed by birds were recorded. Tree abundance was higher in forest habitats while saplings and seedlings were more abundant in abandoned coffee sites. Although species richness of adult trees was similar in the three habitats, species richness of saplings and seedlings was much higher in forest and abandoned coffee than in managed coffee sites. However, in spite of their relatively low species richness, managed coffee sites are an important refuge for tree species common to the almost disappeared mature forest in the area. Floristic similarity for adult trees was relatively low between land use types, but clearly higher for seedlings, indicating homogenizing processes at the landscape level. More than half of the saplings and seedling were not represented by adults in the canopy layer, suggesting the importance of seed dispersal by birds between habitats. Our results show that each of the studied ecosystems plays a unique and complementary role as seed source and as habitat for tree recovery and tree diversity."],["dc.identifier.doi","10.1016/j.ppees.2006.10.001"],["dc.identifier.gro","3150007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6727"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","1433-8319"],["dc.subject","Agroforestry systems; Coffee plantation; Intervened forest; Species richness; Structural characteristics; Tropical landscape"],["dc.title","Tree recovery and seed dispersal by birds: Comparing forest, agroforestry and abandoned agroforestry in coastal Ecuador"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","520"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Biotropica"],["dc.bibliographiccitation.lastpage","529"],["dc.bibliographiccitation.volume","41"],["dc.contributor.author","Haro-Carrion, Xavier"],["dc.contributor.author","Lozada, Tannya"],["dc.contributor.author","Navarrete, Hugo"],["dc.contributor.author","de Koning, G. H. J."],["dc.date.accessioned","2018-11-07T08:28:01Z"],["dc.date.available","2018-11-07T08:28:01Z"],["dc.date.issued","2009"],["dc.description.abstract","To assess the contributions of rustic shade cacao plantations to vascular epiphyte conservation, we compared epiphyte species richness, abundance, composition, and vertical distributions on shade trees and in the understories of six plantations and adjacent natural forests. On three phorophytes and three 10 x 10 m understory plots in each of the agroforestry plantations and natural forests, 54 and 77 species were observed, respectively. Individual-based rarefaction curves revealed that epiphyte species richness was significantly higher on forest phorophytes than on cacao farm shade trees; detailed analyses showed that the differences were confined to the inner and outer crown zones of the phorophytes. No differences in epiphyte species richness were found in understories. Araceae, Piperaceae, and Pteridophyta were less species-rich in plantations than in forests, while there were no differences in Orchidaceae and Bromeliaceae. Regression analysis revealed that epiphyte species richness on trunks varied with canopy cover, while abundance was more closely related to soil pH, canopy cover, and phorophyte height. For crown epiphytes, phorophyte diameter at breast height (dbh) explained much of the variation in species richness and abundance. There were also pronounced downward shifts in the vertical distributions of epiphyte species in agroforests relative to natural forests. The results confirm that epiphyte diversity, composition, and vertical distributions are useful indicators of human disturbance and showed that while the studied plantations serve to preserve portions of epiphyte diversity in the landscape, their presence does not fully compensate for the loss of forests."],["dc.description.sponsorship","Federal Ministry of Education and Research (BMBF), Germany"],["dc.identifier.doi","10.1111/j.1744-7429.2009.00510.x"],["dc.identifier.isi","000267538200016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16326"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell Publishing, Inc"],["dc.relation.issn","0006-3606"],["dc.title","Conservation of Vascular Epiphyte Diversity in Shade Cacao Plantations in the Choco Region of Ecuador"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]