A5046187483- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Rangeland Management and Livestock Ecology
- Conservation, Biodiversity, and Resource Management
- Remote Sensing in Agriculture
- Land Use and Ecosystem Services
- Ecology and Vegetation Dynamics Studies
- Zoonotic diseases and public health
- Vector-borne infectious diseases
- Mosquito-borne diseases and control
- Viral Infections and Vectors
- Plant and animal studies
- Forest ecology and management
- Soil erosion and sediment transport
- African Botany and Ecology Studies
- Geochemistry and Geologic Mapping
- Geographic Information Systems Studies
- Forest Management and Policy
- Forest Ecology and Biodiversity Studies
- Remote-Sensing Image Classification
- Wildlife-Road Interactions and Conservation
- Hydrology and Watershed Management Studies
- Remote Sensing and LiDAR Applications
- Maritime Navigation and Safety
- Lepidoptera: Biology and Taxonomy
University of Helsinki
2014-2024
Helsinki University Hospital
2020
Land cover change takes place in sub-Saharan Africa as forests and shrublands are converted to agricultural lands order meet the needs of growing population. Changes land also impact carbon sequestration vegetation with an influence on climate continental scale. The tree aboveground stocks was studied Taita Hills, Kenya. between 1987 2011 for four points time assessed using SPOT satellite imagery, while density various types field measurements, allometric biomass functions airborne laser...
Classifying land use/land cover (LULC) with sufficient accuracy in heterogeneous landscapes is challenging using only satellite imagery. To improve classification inclusion of features from auxiliary geospatial datasets models applied since 1980s. However, the method mostly limited to pixel-based classifications, and coverage, resolution free open-access have been poor until recent years. We evaluated how global coverage object-based LULC compared spectral texture images. feature sets...
Significance The southern Amazon is one of the fastest changing places on Earth. Deforestation giving place to a dynamic and diverse landscape, comprising small-scale farmers large-scale commercial agriculture with differing land uses. Understanding how these different uses affect ecosystems local climates essential for promoting strategies mitigate environmental changes. Here, we show that leads higher increase in surface temperature, comparison farms. We also found evidence changes...
Human–wildlife conflict (HWC) is a growing concern for local communities living in the vicinity of protected areas. These conflicts commonly take place as attack by wild animals and crop-raiding events, among other forms. We studied patterns non-human primates forest–agricultural landscape mosaic Taita Hills, southeast Kenya. The study applies both qualitative quantitative methods. Semi-structured questionnaire was used primary data collection from households, statistical tests were...
This study aims to elucidate the variations in spatiotemporal patterns and sociodemographic determinants of SARS-CoV-2 infections Helsinki, Finland. Global local spatial autocorrelation were inspected with Moran's I LISA statistics, Getis-Ord Gi* statistics was used identify hot spot areas. Space-time detect clusters high relative risk regression models implemented explain for clusters. The findings revealed presence clustering COVID-19 cases. High-high areas emerged primarily Helsinki's...
African mountains are characterized by high levels of biodiversity and provide ecosystem services to millions people. Due steep environmental gradients, growing human populations geographical isolation, these coupled socio-ecological systems highly vulnerable climate change impacts. The capacity local stakeholders anticipate future changes assess their potential impacts is paramount for enhancing adaptation resilience. Here we apply a participatory scenario development framework in two parts...
Abstract Persistence of forest‐dependent species in fragmented landscapes strongly relies on sufficient dispersal between patches, making it important to understand how animal movements are affected by the intervening matrix. Movements can be influenced through selection or avoidance land cover based their perceived suitability for foraging providing cover. The composition and configuration matrix will, therefore, most likely an factor consider when estimating connectivity patches. To...
Ticks are responsible for transmitting several notable pathogens worldwide. Finland lies in a zone where two human-biting tick species co-occur: Ixodes ricinus and persulcatus. Tick densities have increased boreal regions worldwide during past decades, tick-borne been identified as one of the major threats to public health face climate change. We used distribution modelling techniques predict distributions I. persulcatus, using aggregated historical data from 2014 2020 new occurrence 2021....
The largest actively cycling terrestrial carbon pool, soil, has been disturbed during latest centuries by human actions through reduction of woody land cover. Soil organic (SOC) content can reliably be estimated in laboratory conditions, but more cost-efficient and mobile techniques are needed for large-scale monitoring SOC e.g. remote areas. We demonstrate the capability a hyperspectral camera operating visible-near infrared wavelength range practical estimation soil nitrogen content, to...
Savannahs provide valuable ecosystem services and contribute to continental global carbon budgets. In addition, savannahs exhibit multiple land uses, e.g., wildlife conservation, pastoralism, crop farming. Despite their importance, the effect of use on woody aboveground biomass (AGB) in is understudied. Furthermore, fences used reduce human–wildlife conflicts may affect AGB patterns. We assessed densities patterns, a multi-use savannah landscape southeastern Kenya. was with field survey...
The numbers of reported human tick-borne encephalitis (TBE) cases in Europe have increased several endemic regions (including Finland) recent decades, indicative an increasing threat to public health. As such, it is important identify the at risk and most influential factors associated with TBE distributions, particularly understudied regions. This study aimed areas transmission two different datasets based on disease from 2007 2011 (n = 86) 2012–2017 244). We also examined which best...
Tropical montane forests are known to support many endemic species with restricted geographic ranges. Many of these however, faced numerous threats, most notably from habitat loss and degradation, invasive alien species, climate change. Examples include Taita Apalis Thrush. (Apalis fuscigularis) Thrush (Turdus helleri) birds listed as Critically Endangered by the Government Kenya International Union for Conservation Nature (IUCN). They Hills' cloud in southeastern protected under Wildlife...
Afromontane tropical forests maintain high biodiversity and provide valuable ecosystem services, such as carbon sequestration. The spatial distribution of aboveground biomass (AGB) in forest-agriculture landscape mosaics is highly variable controlled both by physical human factors. In this study, the objectives were (1) to generate a map AGB for Taita Hills, Kenya, based on field measurements airborne laser scanning (ALS), (2) examine determinants using geospatial data statistical modelling....
People and wildlife have co-occurred, sharing resources for thousands of years, however, over the last four decades records human–wildlife conflict increasingly emerged. Human–elephant is a form such conflict, resulting from negative interactions between people elephants. affects local community livelihood success elephant conservation. Tsavo East West National Parks, which cover about 60% Taita Taveta County land area, host single largest population in Kenya. We analysed human–elephant...