WorldCat Identities

Kreft, Holger

Works: 77 works in 138 publications in 2 languages and 624 library holdings
Roles: Other, dgs, Author
Publication Timeline
Most widely held works by Holger Kreft
Epiphyte diversity and microclimate of the tropical lowland cloud forest in French Guiana by Christine Gehrig-Downie( )

1 edition published in 2013 in English and held by 27 WorldCat member libraries worldwide

Lowland cloud forests are well known from temperate regions, e.g. the coasts of California and northern Chile (Bruijnzeel 2001), but in the Tropics have remained uninvestigated. We tested the hypothesis that tropical lowland cloud forest (LCF) and lowland rain forest (LRF) exist as distinct forest types with a higher abundance of epiphytes in LCF and differing in epiphyte species composition and microclimate. Furthermore, these forest types seem to occur in close proximity to one another, with LCF in valleys and LRF on adjacent slopes. To validate this hypothesis, we compared epiphyte diver
Diversity patterns of herbaceous angiosperms along gradients of elevation and forest use intensity in Central Veracruz, Mexico by Jorge Antonio Gomez Diaz( )

3 editions published between 2016 and 2017 in English and held by 19 WorldCat member libraries worldwide

Terrestrial herbs are an important element in tropical forests; however, there is a lack of research on their diversity patterns and how they respond to different forest use intensities. Studying the richness and distributional patterns of this group along elevational gradients is important in order to understand the general processes that influence this distribution. Previous investigations have been done on elevational gradients and the effect of land use intensity on plant diversity, however, relevant research on herbaceous angiosperms is still scarce compared to other groups of vascular
Plant genetic diversity in tropical lowland rainforest transformation systems in Sumatra (Indonesia) by Natalie Breidenbach( )

4 editions published in 2016 in English and held by 19 WorldCat member libraries worldwide

Forest are covering globally 31 % of the terrestrial area. Tropical rainforests cover 5 % of the terrestrial surface and are biodiversity hotspots due to their high number of endemic species and high species richness. The agricultural expansion increases the deforestation rate in Indonesia to the highest worldwide. Main land-use change drivers in Indonesia are logging, mining activities and the production of rubber (Hevea brasiliensis) and palm oil (Elaeis guineensis), which leads to a forest conversion rate of 20 000 km2/ year. Whereas tropical rainforest are an important carbon storage, t
Shade trees in cacao agroforestry systems: influence on roots and net primary production by Yasmin Joana Monna Abou Rajab( )

2 editions published in 2016 in English and held by 18 WorldCat member libraries worldwide

Huge areas of natural forests are rapidly cleared worldwide to make way for agricultural cultivation systems. This has a substantial impact on the functioning of ecosystems, as well as on carbon cycling and hence effects global climate change. Currently, Indonesia has one of the highest deforestation rates worldwide and on the island of Sulawesi, where this study was carried out, substantial tracts of primary forest are being cleared in order to predominantly cultivate cacao (Theobroma cacao L.), which made Sulawesi the biggest producer of cacao within Indonesia. Cacao is an understory rain
(Psilocybe cyanescens) in Germany ecology and taxonomy of an invasive neomycete by Alexander Gießler( )

3 editions published between 2016 and 2018 in English and held by 18 WorldCat member libraries worldwide

Psilocybe cyanescens ist ein invasiver, jedoch kaum erforschter, Kulturfolger in Deutschland. Die ökologischen und gesellschaftlichen Probleme im Zusammenhang mit diesem stark psychoaktiven Vertreter der Strophariaceae verlangten nach einer umfassenden Studie, die seine aktuelle Verbreitung, spezifischen Merkmale und taxonomische Stellung als Grundlage für den zukünftigen Umgang mit ihm darlegt. Diese Arbeit deckt über Feldaufnahmen, Kultivierungsversuche, mikroskopische Studien, Kreuzungsversuche sowie genetische Fingerabdrücke verschiedenste biologische Aspekte ab. Die Ergebnisse offenbar
Local and landscape effects on arthropod communities along an arable-urban gradient by Hannah Reininghaus( )

3 editions published between 2017 and 2018 in German and held by 18 WorldCat member libraries worldwide

The increase and expansion of urbanisation and agriculture intensification has led to a decrease of natural habitats worldwide. Natural habitats offer resources such as food or nesting sites for different arthropod groups. Decline of these habitats could cause a loss of arthropod biodiversity. Semi-natural habitats in farmland, but also green spaces (e.g. parks and gardens) in cities that have high plant richness and flower cover, can potentially maintain this biodiversity and the associated ecosystem services. Pollinators provide vital ecosystem services and are highly dependent on floweri
Integrating economic costs into global biodiversity conservation priorities: Sensitivity of prioritization to the use of differing cost indicators by Georg Barth( )

1 edition published in 2016 in English and held by 17 WorldCat member libraries worldwide

Protected area systems that are ecologically representative and effectively managed are essential tools for the conservation and sustainable use of biodiversity worldwide. However, global protected area coverage and management effectiveness is highly insufficient, even in areas of global biodiversity significance. Under the Convention on Biological Diversity (CBD), governments committed to improve management effectiveness and expand the global coverage of protected areas from 13% to 17% of land area by 2020, targeting especially areas of particular importance for biodiversity. It is importa
Experimental biodiversity enrichment in an oil-palm plantation by Anne Gérard( )

2 editions published in 2016 in English and held by 17 WorldCat member libraries worldwide

Die großflächige Umwandlung von tropischen Wäldern hat zu dramatischen Verlusten von Biodiversität und assoziierten Ökosystemdienstleistungen und -funktionen geführt. Indonesien ist ein besonders schwerwiegendes Beispiel für den Verlust von Waldflächen und Biodiversität. Landumnutzungen, in starkem Maße durch den Anbau von Ölpalmen vorangetrieben, stellen eine erhebliche Bedrohung für die außergewöhnlich hohe Biodiversität des Landes dar. Landwirtschaftssysteme, wie Agroforstsysteme, können hingegen genutzt werden, um die Biodiversität und Ökosystemfunktionen in von Ölpalmen dominierten Lan
Environmental heterogeneity-species richness relationships from a global perspective by Anke Stein( )

2 editions published in 2014 in English and held by 17 WorldCat member libraries worldwide

Heterogenität von Umweltbedingungen gilt als einer der wichtigsten Faktoren für die Verteilung von Artenreichtum weltweit. Laut der Habitatheterogenität-Hypothese bieten räumlich heterogenere Gebiete eine höhere Vielfalt an Umweltparametern und weisen mehr Refugien und Möglichkeiten zur Isolation und Radiation auf. Dadurch begünstigen sie Koexistenz, Persistenz und Diversifikation von Arten. Die Erforschung potentieller positiver Effekte von Heterogenität auf Artenreichtum fasziniert Ökologen und Evolutionsbiologen seit Jahrzehnten. Dementsprechend existieren zahlreiche Studien über die Bez
The role of heterogeneity in spatial plant population dynamics by Clara-Sophie van Waveren( )

2 editions published between 2016 and 2017 in English and held by 17 WorldCat member libraries worldwide

Ecological theory names interacting mechanisms that allow competing species to coexist in limited available space, some of them are perceive as antagonistic. Most prominent are niche differentiation, heterogeneity and neutrality (ecological equivalence). Species similarity is also influenced by two mechanisms: Habitat filtering selects for ecologically similar species, while niche differentiation reduces competitive pressure and thus prefers ecologically different species. The spatial arrangement of abiotic resources can determine the spatial pattern and competition framework for a pre-sele
The assembly of island floras from a macroecological perspective by Christian König( )

2 editions published in 2019 in English and held by 17 WorldCat member libraries worldwide

Islands have always played a central role in ecology and biogeography. On the one hand, island biotas are ecologically unique by featuring exceptionally high rates of endemism and remarkable evolutionary adaptations while being generally poor in species. On the other hand, the geographical, climatic, and geological diversity of islands across the globe facilitates the detailed study of abiotic and biotic factors that have shaped these extraordinary assemblages. Many findings from island biogeography have led to general ecological insights in the past, e.g. the dynamic regulation of species
Feeding Interactions and Their Relevance to Biodiversity under Global Change by Yuanheng Li( )

2 editions published in 2017 in English and held by 17 WorldCat member libraries worldwide

This dissertation focuses on the effect of multiple global change drivers on feeding interaction strength and biodiversity loss. The mechanisms of their influences on food webs are demonstrated by simple food chain motifs and energy flow
Assembly processes in soil animal communities integrating phylogeny and trait-based approaches by Ting-Wen Chen( )

3 editions published between 2017 and 2018 in English and held by 17 WorldCat member libraries worldwide

Soils are among the most biodiverse systems on earth. The coexistence in soils of a multitude of animal species has long puzzled soil ecologists. How can so many species co-occur, and what are the processes driving and maintaining species coexistence in soil? Using a deductive approach, I propose that (1) there are assembly processes, (2) that work on, or are related to, certain objects, i.e., functional traits, to (3) produce particular patterns. I use a conceptual model combining patterns of evolution of species traits, trait similarity and phylogenetic relatedness between coexisting spec
Biodiversity and ecosystem processes in an experimental island system by Hagen Andert( )

3 editions published between 2017 and 2018 in English and held by 17 WorldCat member libraries worldwide

The field of island research is one of the best researched topics in ecological and evolutionary research. As islands are spatially restricted and basic principles of island colonization are investigated, they display one of the best research patches to be based on. Islands are classified into oceanic islands, continental shelf islands, habitat islands or non-marine islands. Within the last decades, most studies focused on oceanic islands as they are good research models for habitats, which started to establish millions of years ago. In the context of global warming and rising sea levels, i
Land-use impacts on biodiversity and ecosystem functioning of complex multitrophic communities by Andrew D Barnes( )

2 editions published between 2015 and 2016 in English and held by 17 WorldCat member libraries worldwide

Global biodiversity is rapidly declining, resulting in far-reaching impacts on the functioning of ecosystems and human wellbeing. In recent decades, anthropogenic land use has been identified as a major driver of biodiversity loss, especially through the expansion and intensification of agricultural systems. While the drivers of biodiversity loss have been relatively clearly established, variability in the way that whole ecosystems respond to these drivers is still poorly understood. This is, in part, because we still lack a clear understanding of how species interactions govern the way tha
Effects of different energy cropping systems on plant diversity in Central German agricultural landscapes by Charlotte Seifert( )

2 editions published between 2014 and 2015 in English and held by 17 WorldCat member libraries worldwide

Der große Artenreichtum der mitteleuropäischen Kulturlandschaften ist zu weiten Teilen unmittelbar von bestimmten extensiven Formen der Landbewirtschaftung abhängig. Vielfältige, artenreiche Biozönosen waren und sind ein wichtiger Bestandteil landwirtschaftlicher Nutzflächen. Sie haben sich seit dem Neolithikum im Wechselspiel mit den landwirtschaftlichen Wirtschaftsweisen kontinuierlich weiterentwickelt. Erst als synthetische Pflanzenschutzmittel, Mineraldünger und leistungsstarke Landmaschinen in der zweiten Hälfte des 20. Jahrhunderts weite Verbreitung erfuhren, setzte ein bis dato beisp
Definition of areas with high conservation priority in Southern Ecuador - An approach combining spatial and temporal patterns of deforestation and human impact with endemic plant diversity by María Fernanda Tapia Armijos( )

3 editions published between 2015 and 2016 in English and held by 17 WorldCat member libraries worldwide

Los bosques del Sur del Ecuador tienen un alto valor para la conservación puesto que están muy amenazados pero también poseen altos niveles de biodiversidad y endemismo. Sin embargo, como el proceso de conservación es inherentemente espacial, la baja disponibilidad de información espacial acerca de los factores que promueven la vulnerabilidad de estos bosques y acerca de la distribución espacial de los objetivos de conservación ha provocado varios obstáculos para la conservación de los mismos. El objetivo principal de esta tesis fue generar información espacial acerca de las amenazas y los
Ant diversity, function and services across tropical land-use systems in Indonesia by Lisa Helen Denmead( )

2 editions published in 2016 in English and held by 17 WorldCat member libraries worldwide

Land-use change due to agricultural expansion is one of the greatest global threats to biodiversity and associated ecosystem functions and services. In the tropics in particular, conversion of forest and agroforests into monoculture agriculture such as oil palm is happening at an extremely rapid rate, leading to highly simplified landscapes. In Indonesia, currently the world's leading palm oil producer, oil palm plantation crop cover was nine million hectares in 2010 with a projected increase to 18 million hectares by 2020. The predicted further large-scale expansion of oil palm plantations
The Macroecology of Island Floras by Patrick Weigelt( )

2 editions published in 2014 in English and held by 17 WorldCat member libraries worldwide

Marine islands harbour a great part of our planet's biological diversity and a high proportion of endemic species. However, island biota are particularly susceptible to anthropogenic threats like climate change, habitat loss and species invasions, making a detailed understanding of ecological processes on islands imperative if we wish to conserve their unique biotas. Due to their discrete and isolated nature, islands are useful model systems in ecological and evolutionary research. So far, however, most studies have concentrated on small-scale biogeographic patterns, and standardized global
Effects of forest structure and dynamics on vascular epiphyte assemblages - functional trait analyses and modelling studies by Gunnar Petter( )

3 editions published between 2016 and 2017 in English and held by 17 WorldCat member libraries worldwide

Vascular epiphytes are non-parasitic plants that germinate and grow on trees without contact to the soil. Their arboreal life style implies a strong dependence on forest structure and dynamics. Tree architectures change constantly during ontogeny, and large and old branches of the inner crowns are generally more suitable for epiphyte colonization and survival than small branches of the outer crowns. In addition, microclimatic conditions within canopies, such as light, temperature or humidity, are directly influenced by forest structure. While the influence of such gradients within trees and
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Audience level: 0.92 (from 0.91 for Epiphyte d ... to 0.93 for Epiphyte d ...)

Alternative Names
Holger Kreft ahli biologi asal Jerman

Holger Kreft biólogo alemán

Holger Kreft deutscher Biologe, Ökologe und Hochschullehrer

Holger Kreft Duits bioloog

Holger Kreft German biologist

Holger Kreft professor académico alemão

Holger Kreft tysk professor

English (44)

German (3)