Das Auerhuhn ist eine stark gefährdete Brutvogelart der Schweiz. Veränderungen in der Zusammensetzung und Nutzung des Waldes haben dazu geführt, dass sich die Bestände dieses Raufusshuhns in den letzten drei Jahrzehnten halbiert haben. Deshalb sollen die Lebensraumansprüche des attraktiven Waldvogels vermehrt in der Planung und Umsetzung von Waldreservaten und der Bewirtschaftung von Wäldern der höheren Lagen berücksichtigt werden. Auf der kleinen räumlichen Ebene sind die Habitatsansprüche der Art durch Untersuchungen in West- und Mitteleuropa (Storch 1993, 2002, Schroth 1994) und Skandinavien relativ gut bekannt. Dagegen werden die Populationsprozesse auf der Ebene der Landschaft erst in Ansätzen verstanden (Sjöberg 1996, Kurki 2000). Entsprechend konnte man die Bestandsrückgänge in den meisten Gebieten Europas noch nicht stoppen, da einerseits genauere Kenntnisse über das Zusammenspiel und die relative Bedeutung der einzelnen Faktoren fehlen (Habitatqualität, Störungen, Prädatoren, Witterung-Klima, Huftierkonkurrenz), und andererseits noch nicht versucht wurde, die Bestandsentwicklung im grossen landschaftlichen Massstab als Metapopulationsdynamik zu verstehen. Es ist das primäre Ziel dieses Projekts, ein räumlich explizites Metapopulationsmodell des Auerhuhns für einen grossen Landschaftsausschnitt der Schweizer Alpen zu erarbeiten. Dabei sollen die erwähnten Einflussfaktoren möglichst umfassend berücksichtigt werden. Die Arbeit soll modellhaft zeigen, dass für das Verständnis von Populationsvorgängen von raumbeanspruchenden Wildtierarten eine Analyse und Bewertung von lokal bis überregional wirksamen Einflussfaktoren notwendig sind. Die Ergebnisse sollen zudem als konzeptionelle Grundlage für den Nationalen Aktionsplan Auerhuhn und für regionale Artenförderungsprojekte dienen. Folgende Fragen und Themen sind für das Projekt von zentraler Bedeutung: Wie gross ist das landschaftsökologische Lebensraumpotenzial für das Auerhuhn in den Alpen, wie ist es räumlich verteilt? Wie verteilen sich die lokalen Auerhuhnpopulationen in diesen Potenzialgebieten? Wie gross sind die Bestände? Welche Faktoren beeinflussen den Status von Lokal- und Regionalpopulationen? Welche Populationen haben abgenommen oder sind verschwunden, welche sind stabil (Source-Sink-Mechanismen)? Zwischen welchen räumlich getrennten Populationen besteht ein Austausch? Welche Landschaftselemente wirken als Barrieren? Entwickeln einer nicht-invasiven Methode für die genetische Differenzierung von Populationen, sowie für Bestandsschätzungen und Monitoring.
Traditional Indonesian homegardens harbour often high crop diversity, which appears to be an important basis for a sustainable food-first strategy. Crop pollination by insects is a key ecosystem service but threatened by agricultural intensification and land conversion. Gaps in knowledge of actual benefits from pollination services limit effective management planning. Using an integrative and agronomic framework for the assessment of functional pollination services, we will conduct ecological experiments and surveys in Central Sulawesi, Indonesia. We propose to study pollination services and net revenues of the locally important crop species cucumber, carrot, and eggplant in traditional homegardens in a forest distance gradient, which is hypothesized to affect bee community structure and diversity. We will assess pollination services and interactions with environmental variables limiting fruit maturation, based on pollination experiments in a split-plot design of the following factors: drought, nutrient deficiency, weed pressure, and herbivory. The overall goal of this project is the development of 'biodiversity-friendly' land-use management, balancing human and ecological needs for local smallholders.
Increasing population pressure is leading to unsustainable land use in North Vietnamese highlands and destruction of natural habitats. The resulting loss of biodiversity includes plant genetic resources - both wild (= non-cultivated) species and cultivated landraces - adapted to local conditions, and local knowledge concerning the plants. A particularly important group among endangered plants are the legumes (1) because Southeast Asia is a major centre of genetic diversity for this family, and (2) because the potential contribution of legumes to sustainable land use is, due to their multifunctionality (e.g., soil improvement, human and livestock nutrition), especially high. The project aims to contribute to the conservation and sustainable use of genetic resources of legumes with an integrated approach wherein a series of components are combined: (1) A participatory, indigenous knowledge survey complemented by information from the literature; (2) germplasm collection missions (for ex situ conservation) complemented by field evaluation and seed increase; (3) genetic diversity analysis of selected material by molecular markers; and (4) GIS based analysis of generated data to identify areas of particular genetic diversity as a basis for land area planning and in situ preservation recommendations. Project results are expected to be also applicable to similar highlands in Southeast Asia.
The vegetation of East and South African savannahs has been shaped by the complex interaction of geo-biophysical processes and human impact. For both regions a controversial discussion is pertinent, as to whether massive degradation threatens the sustainability of livelihoods in these regions. Rangeland vegetation is mainly affected by environmental conditions (soil and climate) and by livestock management. Extent and interaction of these drivers are not well understood but have profound impacts on the resilience and vulnerability of these systems to be shifted toward unfavourable degraded or bush encroached states. The project aims to analyse and model rangeland vegetation in response to range management including livestock, soil quality and climatic conditions and to assess the impacts of changes in these conditions on the resilience and vulnerability of rangeland systems. Field measurements, remote sensing of vegetation patterns and dynamics and simulation modelling will be used to understand the dynamics of rangeland vegetation. We will use the 'fast' or 'state' variables potential of pastures to produce palatable biomass, the variability of this production, and the system's potential to recover from disturbance impact as indicators of resilience. 'slow' variables that control (or drive) the 'fast' variables such as management, climate and soil variables are recorded in cooperation with other subprojects as with A1 for soil variables. Results of the project will show which management activities are most favourable for individual regions to sustain plant production in the long term.
Invasive alien species are recognized as one of the leading threats to biodiversity. They also impose enormous costs on agriculture, forestry and human health. In Europe and elsewhere, most countries are presently developing national and international strategies to assess the full scope of the danger represented by invasive non-indigenous species, and to take the necessary measures to prevent and manage the threat effectively. The initial step in a national programme against non-indigenous species must be a survey of the species already established in the country, as well as those species which are likely to invade the country in the near future, together with their perceived, actual and potential economic and environmental impact. In this project, we propose to carry out an inventory of non-indigenous insects in Bulgaria, Macedonia and Albania. The general objective of the project is to provide these three countries wit information on invasive alien insects in the Balkans and to develop local expertise in the field of invasive alien species management. This will allow the development of national strategies against alien insects, and non-indigenous organisms in general. Firstly, a database on non-indigenous insects established in Bulgaria, Macedonia and Albania will be set up. Then, we will provide informative fact sheets for the 30-40 main invasive, or potentially invasive, insects in the region. Finally, we will analyse the data to extract information on pathways, species or ecosystems traits that make them prone to invasion, and we will incorporate these analyses into similar studies carried out as part of on-going European projects on risk and impact assessment. In addition, as a case study, we are assessing the impact of the horse-chestnut leaf miner, Cameraria ohridella, an invasive moth which first appeared in the Balkans in the 1980s before spreading to the whole of Europe, and which is suspected to threaten the few remaining endemic stands of horse-chestnut (Aesculus hippocastanum) in the Balkans.
Wildfires are a major problem for many European societies threatening human lives and property with disastrous impacts particularly at the wildland-urban interface. On the other hand humans always used fire as a tool to regulate nature and traditional use of fire is known in many regions of Europe. The understanding of this paradox, is thus essential for finding solutions for integrated wildland fire management.This concept requires considering the various aspects of fire, from its use as a planned management practice (prescribed fire) to the initiation and propagation of unplanned fires (wildfires) and to the use of fire in fighting wildfires (suppression fire). Prescribed or suppression fires will therefore set the limits for wildfires by vontrolling their spatial extent, intensity and impacts. This is the main approach adopted aiming at the creation of the scientific and technological bases for new practices and policies under integrated wildland fire management and in the development of strategies for its implementation in Europe. Three major domains of related activities were considered: research, development and dissemination. In research, the project will focus on understanding the machanisms and modelling the processes associated with fire, from physics to biology and social sciences. Experimental and sampling methods will be used. The scientific and technical knowledge gathered will allow the development of a technological platform that will integrate the fire model, the temporal and spatial variability of fuels and weather, and the potential ecological and social-economical impacts. Documentation and demonstration platforms will also be extensively used for dissemination, focusing in the development of stategies for public awarness, academic and professional training using new communication technologies and networks, and for the implementation of new practices, policies and regulations under the concept of integrated wildland fire management. Prime Contractor: Universidade Tecnica de Lisboa, Instituto Superior de Agronomia; Lisboa; Portugal.
Nutrient loss from ecosystems has become of global major global concern as it reduces the sustainability of ecosystems and because it causes eutrophication of surface water. In this project we investigate whether soil fungi enhance ecosystem sustainability by preventing nutrient leaching loss after rainfall. Background: Leaching of nutrients (nitrogen and phosphorus) from fertile agricultural ecosystems has become of major global concern because it causes eutrophication of surface water with adverse consequences for human health and water quality. Moreover, losses from infertile ecosystems can reduce plant productivity and ecosystem sustainability if there is no additional nutrient input. Hence, it is of critical importance to understand which mechanisms prevent nutrient loss and retain nutrients inside ecosystems. Besides lateral transport of nutrients via soil erosion and surface runoff, vertical movement through the soil profile (e.g. leaching) has been recognized as an important process contributing to nutrient loss. Until now there are no studies that tested whether mycorrhizal fungi can reduce nutrient losses. This is surprising because mycorrhizal fungi are often very abundant in the soil and play a key role in the nutrient cycle of plant communities. Mycorrhizal fungi can forage highly effectively for nutrients in the soil and, by doing so they could prevent leaching of nutrients (e.g. in winter or during periods with heavy rainfall). Aims: The following key questions are investigated in this project: 1. Can mycorrhizal fungi reduce nutrient loss from experimental grassland? 2. Can arbuscular mycorrhizal fungi reduce nutrient leaching losses at high soil fertility, low temperatures and when rainfall intensity increases? 3. Is ecosystem sustainability (measured as nutrient retention and reduced nutrient loss after rainfall) enhanced by the presence of diverse communities of arbuscular mycorrhizal fungi? Relevance: It has been reported that the available phosphate sources will be depleted in about 50 years and some authors suggest that we will face a phosphate crisis endangering agricultural production. Thus, it is of critical importance to understand whether mycorrhizal fungi can reduce phosphorus loss from soils. Moreover, the production of nitrogen fertiliser is energetically expensive and high levels of nitrate in groundwater are of concern because they can pose a significant health risk and have a negative impact on downstream ecosystems. Hence, this shows that there is a need to better understand which factors influence the N-cycle and reduce N-losses.
In our central European man-made landscape more and more habitats become destroyed or fragmented because of the increasing anthropogenic need of available land. Roads, residential, and industrial areas separate formerly connected habitats into small remnants, thus creating small subpopulations. Especially stenotopic species with low dispersal power are endangered because exchange of specimen between different habitat patches is reduced or entirely inhibited. Methods for the quantification of fragmentation are necessary to develop management and species-specific conservation plans for habitat networks. In this project we investigate the structure of the German woodlands by calculating landscape metrics and study the impacts of fragmentation on different FFH-species' occurrences. Indices which significantly quantify the fragmentation of woodlands are identified by using a simulation model of neutral landscapes. ATKIS2008-data are used for the calculation of the selected landscape metrics. Topographic maps (TK25) serve as the interface between determinated fragmentation of forest and habitat modelling. A niche model of different species is calculated to demonstrate the impacts of woodland fragmentation on different woodland species (e.g. wild cat (Felis sylvestris), barbastelle bat (Barbastella barbastellus), stag beetle (Lucanus cervus), and black stork (Ciconia nigra).
Forest structure is altered by humans for long times (Bramanti et al. 2009). The long lasting modification of forests pursuant to human demands modified the living conditions for birds as well as for many other animals. This included changes in resource availability (e.g., food, foraging, nesting sites) and changes of interspecific interactions, e.g., parasitism and predation (Knoke et al. 2009; Ellis et al. 2012). Also species compositions and the survivability of populations and even species are affected. The loss of foraging sites and suitable places for reproduction, the limitation of mobility due to fragmented habitats and the disturbances by humans itself may lead to more stressed individuals and less optimal living conditions. In certain cases species are not able to deal with the modified requirements and their populations will shrink and even vanish. Depending on the intensity of management and the remaining forest structure, biodiversity is more or less endangered. Especially in systems of two or more strongly connected taxa changing conditions that affect at least one part may subsequently affect the other, too. One system of interspecific communities that recently attracted the attention of biologists includes birds, blood parasites (haemosporidians) and their transmitting vectors. For instance, avian malaria (Plasmodium relictum) represents the reason for extreme declines in the avifauna of Hawaii since the introduction of respective vectors (e.g. Culicidae) during the 20th century (van Riper et al. 1986, Woodworth et al. 2005). With the current knowledge of this topic we are not able to predict if such incidences could also occur in Germany. All in all, different management strategies and intensity of forest management may influence the network of birds, vectors and blood parasites and change biodiversity. To elucidate this ecological complex, and to understand the interactions of the triad of songbirds as vertebrate hosts, dipteran vectors and haemosporidians within changing local conditions, I intend to collect data on the three taxa in differently managed forest areas, the given forest structure and the climatic conditions. I will try to explain the role of abiotic factors on infection dynamics, in detail the role of forest management intensity. Data acquisition takes place at three spatially divided locations: inside the Biodiversity Exploratory Schwäbische Alb, at the Mooswald in Freiburg, and inside the Schwarzwald.
In my Phd-study, I examine the resource conflict over industrial logging in the South Moresby area on Haida Gwaii (former Queen Charlotte Islands) from 1974 to 1993. On this remote archipelago on British Columbias west-coast, a fierce dispute over logging practices, land rights, Aboriginal land claims and environmental issues had emerged in the face of devastating logging practices were not only threatening to destroy large parts of Moresby Island but also resulted in the destruction of salmon streams. The two major natural resources available on the islands were at stake during the 'war in the woods.' Together with environmentalist, the Haida First Nation successfully fought for the preservation of Gwaii Haanas (South Moresby Island) with blockades, protests, environmental campaigns, lobbying and legal action. The area is now protected as the 'Gwaii Haanas National Park Reserve.-' Using a cultural approach combining aspects of 'storytelling,' the 'cultural memory' and 'actor-network-theory' (ANT), the core question arises whether the (Western) dualisms between 'nature' and 'culture' and between 'fact' and 'fiction' should be dissolved. Latour argues that such dualisms and even the separation between the human and non-human world (i.e., the world of things) do not exist. Assmann claims that we do not necessarily remember what has really happened', but what was repeatedly told us to have happened. Along with Thomas King, J. Edward Chamberlin and William Cronon, I stress the point that stories - fictitious or based on facts - do matter. The effect of stories on the way we understand our past, might often be more important than that of 'hard' facts: Stories shape both a societys concept of the past and its present identity. Canada, with its heterogeneous population, is a particularly interesting place to conduct research about different concepts of 'nature' and culture'. Analyzing the different stories that evolved around South Moresby, and taking into account diverging messages of native and non-native stories, offers a new perspective on similar resource conflicts that continue to exist and arise all over the world.
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