Christina Fischer

Christina Fischer
Hochschule Anhalt · Department of Agriculture, Ecotrophology, and Landscape Development

Professor

About

94
Publications
40,593
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
4,342
Citations
Additional affiliations
August 2013 - December 2019
Technische Universität München
Position
  • PostDoc Position
Description
  • I have been working in the Restoration Ecology lab.
April 2012 - July 2013
Technische Universität München
Position
  • Technische Universität München
Description
  • Postdoctoral researcher
November 2010 - March 2012
Leibniz Centre for Agricultural Landscape Research
Position
  • ZALF
Description
  • Postdoctoral researcher within the AgroScapeLabs project

Publications

Publications (94)
Preprint
Full-text available
Quantifying animal movements is necessary for answering a wide array of research questions in ecology and conservation biology. Consequently, ecologists have made considerable efforts to identify the best way to estimate an animal’s home range, and many methods of estimating home ranges have arisen over the past half century. Most of these methods...
Article
Full-text available
Roadsides, in particular those being species-rich and of conservation value, are considered to improve landscape permeability by providing corridors among habitat patches and by facilitating species' dispersal. However, little is known about the potential connectivity offered by such high-value roadsides. Using circuit theory, we modelled connectiv...
Preprint
Context: Landscape composition and configuration, as well as seasonal landscape dynamics shape the behaviour, movement and energy expenditure in animals, i.e. foraging, hiding or fleeing, and ultimately survival. Especially in highly modified agricultural systems it is crucial to gain an understanding of how animal behaviour is influenced by landsc...
Article
Full-text available
Macroecological studies that require habitat suitability data for many species often derive this information from expert opinion. However, expert‐based information is inherently subjective and thus prone to errors. The increasing availability of GPS tracking data offers opportunities to evaluate and supplement expert‐based information with detailed...
Article
Full-text available
Urban green space is increasingly brought into focus by ecologists and city planners. While the process of urbanization destroys natural habitats, it also creates novel ecosystems. This offers possibilities to mitigate climate change and biodiversity losses by creating diverse urban environments that moderate temperature and water regime, and promo...
Preprint
Full-text available
ContextRoads are ubiquitous in human inhabited landscapes, and can impact animal movement and population dynamics, due to barrier effects, road mortality, but also by providing resources at road verges. Thus, we need a better understanding of how roads, in interaction with seasonal changes in habitat structure, affect space use and habitat selectio...
Article
Full-text available
Although many plants are dispersed by wind and seeds can travel long distances across unsuitable matrix areas, a large proportion relies on co-evolved zoochorous seed dispersal to connect populations in isolated habitat islands. Particularly in agricultural landscapes, where remaining habitat patches are often very small and highly isolated, mobile...
Article
Full-text available
Roadsides can harbour remarkable biodiversity; thus, they are increasingly considered as habitats with potential for conservation value. To improve construction and management of roadside habitats with positive effects on biodiversity, we require a quantitative understanding of important influential factors that drive both positive and negative eff...
Article
Full-text available
In arid and semi-arid ecosystems, rainfall and rainfall temporal distribution shape species communities and multi-trophic interactions. Whereas the relationship between climate change-induced decline of precipitation and plants is well know, there is little knowledge of these relationships with consumers, such as arthropods of different trophic lev...
Article
Arable plants and wild bees are negatively affected by agricultural intensification, one of the major drivers of global biodiversity loss. However, it remains unclear how endangered and low competitive arable plants (rare arable plants) contribute to the persistence of flower-visiting wild bees by providing additional flower resources in agricultur...
Article
Full-text available
Although many plants are dispersed by wind and seeds can travel long distances across unsuitable matrix areas, a large proportion relies on co-evolved zoochorous seed dispersal to connect populations in isolated habitat islands. Particularly in agricultural landscapes, where remaining habitat patches are often very small and highly isolated, mobile...
Article
Full-text available
Microsites created by soil- disturbing animals are important landscape elements in arid environments. In the Pre- Namib, dust- bathing behavior of the near- endemic Hartmann's mountain zebra creates unique rolling pits that persist in the landscape. However, the ecohydrological characteristics and the effects of those microsites on the egetation a...
Technical Report
Full-text available
Die Segetalflora Deutschlands ist durch die Intensivierung der Landwirtschaft stark verarmt, weshalb inzwischen viele der charakteristischen Arten der Äcker als gefährdet gelten. In diesem Projekt wurde untersucht, welche Ökosystemfunktionen solche seltenen Ackerwildpflanzen im Agrarökosystem erfüllen. Dies wurde durch Einsaat von 10 seltenen Arten...
Article
Full-text available
Species demanding specific habitat requirements suffer, particularly under environmental changes. The smallest owl of Africa, the Sokoke Scops Owl ( Otus ireneae ), occurs exclusively in East African coastal forests. To understand the movement behaviour and habitat demands of O. ireneae , we combined data from radio-tracking and remote sensing to c...
Article
Full-text available
Context Biological weed control by seed predators is an ecosystem service reducing weed population densities in agricultural landscapes. Drivers of seed predation are manifold and may change with spatial scales considered. Objectives We aimed at identifying the functional identity of seed predators, food web interactions and feeding links between w...
Article
Agricultural land‐use practices have intensified over the last decades, leading to population declines of various farmland species, including the European hare (Lepus europaeus). In many European countries, arable fields dominate agricultural landscapes. Compared to pastures, arable land is highly variable, resulting in a large spatial variation of...
Article
Full-text available
We observed several nests of Isodontia mexicana in the city area of Munich. Intact nests of this non-native digger wasp species and host-parasite-interactions of a trap nest experiment within the years 2019/20 are described. Reports of sightings of I. mexicana in recent years suggest a rapid dispersal potential for this species, possibly aided by t...
Article
Agricultural intensification has caused a strong agro-biodiversity decline in Europe, with high losses in rare arable plants. A better understanding of the relationship between these species, agricultural productivity, and other ecosystem functions can improve conservation management. The study was performed on an experimental field near Munich. To...
Article
Full-text available
The success of nature conservation strongly depends on the attitudes and awareness of people, as well as on the level of poverty, land scarcity, communication gaps, and governance structures. In this commentary we elaborate potential effects of inter-community differences on peoples´ attitudes towards nature conservation and the role of land manage...
Article
Full-text available
Accurately quantifying species’ area requirements is a prerequisite for effective area‐based conservation. This typically involves collecting tracking data on species of interest and then conducting home‐range analyses. Problematically, autocorrelation in tracking data can result in space needs being severely underestimated. Based on previous work,...
Article
Agricultural landscapes are spatially and temporally dynamic habitats that force wildlife to interact with different management practices, such as harvests and mowing events which cause sudden changes in resource availability. Animals may avoid agricultural management events and the changed habitat, to search for undisturbed areas or they might use...
Article
Full-text available
Context Human land use intensified over the last century and simultaneously, extreme weather events have become more frequent. However, little is known about the interplay between habitat structure, direct short-term weather effects and indirect seasonal effects on animal space use and behavior. Objectives We used the European hare (Lepus europaeu...
Article
Effects of anthropogenic activities on habitats and species communities and populations are complex and vary across species depending on their ecological traits. Movement ecology may provide important insights into species’ responses to habitat structures and quality. We investigated how movement behavior across a human‐modified landscape depends o...
Article
Full-text available
Managing agricultural landscapes to support biodiversity and ecosystem services is a key aim of a sustainable agriculture. However, how the spatial arrangement of crop fields and other habitats in landscapes impacts arthropods and their functions is poorly known. Synthesising data from 49 studies (1515 landscapes) across Europe, we examined effects...
Article
Full-text available
https://www.anl.bayern.de/publikationen/anliegen/meldungen/wordpress/bluehstreifen_review/ The intensification of agriculture has led to drastic reductions in biodiversity. As a consequence, the EU has introduced agri-environmental schemes (AES) such as blooming strips and areas. This study reviews the faunistic effects of AES, based on the scient...
Article
Full-text available
https://www.anl.bayern.de/publikationen/anliegen/meldungen/wordpress/bluehstreifen_review/ The intensification of agriculture has led to drastic reductions in biodiversity. As a consequence, the EU has introduced agri-environmental schemes (AES) such as blooming strips and areas. This study reviews the faunistic effects of AES, based on the scient...
Article
Managing agricultural landscapes to support biodiversity and ecosystem services is a key aim of a sustainable agriculture. However, how the spatial arrangement of crop fields and other habitats in landscapes impacts arthropods and their functions is poorly known. Synthesising data from 49 studies (1515 landscapes) across Europe, we examined effects...
Article
Home range estimation is routine practice in ecological research. While advances in animal tracking technology have increased our capacity to collect data to support home range analysis, these same advances have also resulted in increasingly autocorrelated data. Consequently the question of which home range estimator to use on modern, highly autoco...
Article
Full-text available
Agricultural land-use practices have intensified over the last decades, leading to population declines of various farmland species, including the European hare (Lepus eu-ropaeus). In many European countries, arable fields dominate agricultural landscapes. Compared to pastures, arable land is highly variable, resulting in a large spatial variation o...
Article
Different methods to measure species behaviour and space use may produce diverging results, and provide advantages and shortcomings. Data from spot-mapping of animals might be affected from restricted detectability of individuals in dense vegetation, while radio-tracking provides a less biased (or even unbiased) measure of space use. Here we compar...
Article
Full-text available
Context Movement is one of the key mechanisms for animals to deal with changes within their habitats. Therefore, resource variability can impact animals’ home range formation, especially in spatially and temporally highly dynamic landscapes, such as farmland. However, the movement response to resource variability might depend on the underlying land...
Article
Full-text available
The characteristic vegetation structure of arid savannas with a dominant layer of perennial grass is maintained by the putative competitive superiority of the C4 grasses. When this competitive balance is disturbed by weakening the grasses or fa- voring the recruitment of other species, trees, shrubs, single grass, or forb species can increase and i...
Data
Supplementary data: rainfall within last decade, soil moisture during interaction experiment, habitat characteristics soil material, seedling survival, Neighbour-effect intensity index in relation to seasonal rainfall, model summary
Cover Page
Full-text available
Front Cover: A GPS-collared European hare (Lepus europaeus) in a barley field. During the last decades, hare populations have declined due to agricultural intensification. Vegetation height and agricultural field size are important factors affecting habitat selection by hares in arable landscapes. Thus, increasing landscape heterogeneity can increa...
Article
Full-text available
Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint wer...
Article
Urbanization is increasing worldwide, making it essential to improve management of urban greenspaces for better provisioning of ecosystem services and greater biodiversity benefits. At the same time, societal interest in reduced intensity management regimes is growing for a range of practical and normative reasons. We assessed if relative wild urba...
Article
Full-text available
In agriculture, both valuable ecosystem services and unwanted ecosystem disservices can be produced by the same organism group. For example, small rodents can provide biological control through weed seed consumption but may also act as pests, causing crop damage. We studied the hypothesized causal relationships between ecosystem services (removal o...
Article
Full-text available
Agricultural intensification drives biodiversity loss and shapes farmers’ profit, but the role of legacy effects and detailed quantification of ecological–economic trade-offs are largely unknown. In Europe during the 1950s, the Eastern communist bloc switched to large-scale farming by forced collectivization of small farms, while the West kept smal...
Article
Full-text available
Worldwide savannas and arid grasslands are mainly used for livestock grazing, providing livelihood to over a billion people. While normally dominated by perennial C 4 grasses, these rangelands are increasingly affected by the massive spread of native, mainly woody legumes. The consequences are often a repression of grass cover and productivity, lea...
Data
Fitted parameters for Stipagrostis tussock area. Parameter estimates ± SE for area per Stipagrostis tussock on unaffected and affected sites derived from non-linear mixed effect model with asymptotic function, t-values with 97 degrees of freedom. (DOCX)
Data
Habitat characteristics of sites unaffected and affected by Crotalaria podocarpa. Differences in means tested by permutational t-tests (perm.t.test, n = 999), t and p values are given. (DOCX)
Data
Annual and seasonal rainfall on Rooiklip between 2001 and 2016. Rainfall recorded at the rain gauge near the Rooiklip farmhouse on a daily basis. (DOCX)
Article
Full-text available
Post-dispersal seed predation and endozoochorous seed dispersal are two antagonistic processes in relation to plant recruitment, but rely on similar preconditions such as feeding behavior of seed consumers and seed traits. In agricultural landscapes, rodents are considered important seed predators, thereby potentially providing regulating ecosystem...
Data
Table S1. Species information about arable plant species. Table S2. Seed removal rates in the field for the different plant species, sowing rates and predator guilds. Table S3. Feeding rate by mice and voles from video observations in the field. Table S4. Germination rates of arable plant species. Figure S1. Arrangement of the seed removal expe...
Data
Table S1. Establishment and reproduction of the study species Legousia speculum‐veneris (Leg), Consolida regalis (Con) and Lithospermum arvense (Lit) in pure and mixed sowing, with and without removal of spontaneous weeds. Table S2. Results of the full Linear Mixed‐Effects Models for establishment and seed production of the three re‐introduced ara...
Article
Full-text available
1. During the past decades, agro-biodiversity has markedly declined and some species are close to extinction in large parts of Europe. Reintroduction of rare arable plant species in suitable habitats could counteract this negative trend. The study investigates optimal sowing rates of three endangered species (Legousia speculum-veneris (L.) Chaix, C...
Article
Full-text available
Agricultural intensification often leads to fragmentation of natural habitats, such as forests, and thereby negatively affects forest specialist species. However, human introduced habitats, such as hedges, may counteract negative effects of forest fragmentation and increase dispersal, particularly of forest specialists. We studied effects of habita...
Article
Full-text available
Riparian thickets of East Africa harbor a large number of endemic animal and plant species, but also provide important ecosystem services for the human being settling along streams. This creates a conflicting situation between nature conservation and land-use activities. Today, most of this former pristine vegetation is highly degraded and became r...
Data
Figure S1. Home range area (in ha) per individual against sample size (days after start of data acquisition), shown for (a) Minimum Convex Polygon estimator using 95% of the relocations (MCP95) in August 2014; (b) Kernel home ranges for 95% levels (K95) in August 2014, (c) MCP95 in February/ March 2015, and (d) K95 in February/ March 2015.
Article
Full-text available
Species with specific habitat requirements often remain within their habitat and are characterized by a very sedentary behaviour. We used radio-tracking during a 3-wk campaign to investigate the home ranges and movements of three East African passerine bird species, all adapted to cloud-forest habitats: montane white-eye Zosterops poliogaster mbulu...
Article
Agricultural intensification often leads to fragmentation of natural habitats, such as forests, and thereby negatively affects forest specialist species. However, human introduced habitats, such as hedges, may counteract negative effects of forest fragmentation and increase dispersal, particularly of forest specialists. We studied effects of habita...
Article
Full-text available
Conflicts between human needs and nature conservation are exceptionally pronounced along rivers in tropical Kenya, where riparian ecosystems create important retreats for many endangered species, but also provide important ecosystem services for the local human population. This situation has led to a landscape mosaic consisting of dense thickets an...
Conference Paper
Seed predation is an important ecosystem process, which significantly reduces recruitment in many plant species, thereby it can impact the invasion success of non-native but also native plants. In contrast plant invasion can be facilitated by higher seed production and more effective dispersal. Here, we studied pre- and post-dispersal seed predatio...
Conference Paper
Beside food shortage and lack of nesting sites caused by agricultural intensification, avian nest predation might be an important mechanism contributing to the decline of farmland birds. Although both landscape configurational heterogeneity and compositional heterogeneity may affect bird communities within crop fields , most studies focus on landsc...
Conference Paper
The encroachment called shift of arid grasslands from grass dominated to shrub dominated communities is associated with serious implications for ecosystem functions and services that often resemble those of plant invasion by non‐native species. Especially its mostly negative consequences for forage grasses and pastoral production have been subject...
Article
Full-text available
Agricultural intensification is one of the key factors leading to the recent global biodiversity crisis. Especially farmland species are negatively affected by both, agricultural intensification and abandonment. The nocturnal Little Owl Athene noctua inhabits low-intensity agricultural landscapes and showed severe population declines over Central E...
Article
Full-text available
Thickets along rivers in Eastern Kenya are important habitats for many endangered species. These habitats also provide fundamental ecosystem services for humans. Intense anthropogenic activities during the past decades have caused a severe reduction of this vegetation and resulted in fragmentation of the remaining thicket patches. We assessed the o...