Juha M. Alatalo

Qatar University

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Ulf Molau

University of Gothenburg

Yang Bai

Xishuangbanna Tropical Botanical Garden

Annika K. Jägerbrand

University of Gävle

Isla H. Myers‐Smith

University of Edinburgh

Ingibjörg S. Jónsdóttir

University of Iceland

Rajiv Pandey

Indian Council of Forestry Research and Education

Talaat Ahmed

Qatar University

Robert D. Hollister

Grand Valley State University

Michele Carbognani

University of Parma

Alessandro Petraglia

University of Parma

Cooperative Institutions

Swiss Federal Institute for Forest, Snow and Landscape Research

215

Chinese Academy of Sciences

136

Ecological Society of America

John Wiley & Sons (United States)

Czech Academy of Sciences, Institute of Botany

University of Chinese Academy of Sciences

Centre National de la Recherche Scientifique

University of Tartu

Aarhus University

University of Helsinki

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Effect of altitude on the sex ratio in populations of Silene acaulis (Caryophyllaceae)

Nordic Journal of Botany (1995)

Juha M. Alatalo Ulf Molau

Alatalo, J. M. & Molau, U. 1995. Effect of altitude on the sex ratio in populations of Silene acaulis. — Nord. J. Bot. 15: 251–256. Copenhagen. ISSN 0107–055X. Predicted increase of female frequencies in gynodioecious Silene acaulis was tested along an altitude gradient in northern Sweden. Average female frequencies for the four sites increased with altitude from 42% to 59% within a short geographical distance. This follows the outcrossing hypothesis, that female frequencies should be positively correlated with selfing rates of hermaphrodites in populations. More adverse environmental conditions should favour gynodioecy in areas where reproduction to a greater part relies on vegetative reproduction or selfing. Further, a significant difference in corolla width was found between females and the larger hermaphrodites, but not between sites. Cushion size and the number of flowers per cushion decreased with attitude.

Selfing

Gynodioecy

Caryophyllaceae

Silene

Outcrossing

10.1111/j.1756-1051.1995.tb00150.x

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Citations (46)

Vegetation Change in Katsina State, Nigeria: Influence of Local Perceptions and Land Use Land Cover Dynamics

Research Square (Research Square) (2023)

Mohammad Hadi Ahmad Abdullahi Jibrin Ahmed Abubakar Mohd Yusoff Ishak Juha M. Alatalo

Abstract Changing vegetation affects microclimates, groundwater tables, desertification, and biodiversity at the landscape level. The objective of this study is to assess the land cover dynamics and local perception of the influence of land use on vegetation change in Katsina State, Nigeria. Remote sensing and Geographic Information System (GIS)-based analysis, key informant interviews, and a semi-structured questionnaire covering 400 households were used to examine the driving forces behind vegetation change across Katsina State. As a result of the household survey, 86.5% (n = 400) of respondents reported a decline in vegetation in the study area, aligning with the Land Use Land Cover analysis phase of the study. The key drivers behind the observed vegetation depletion in the study area include firewood collection, charcoal production, and population growth. There has been an increasing awareness that education has emerged as one of the most significant socioeconomic factors influencing respondents' perceptions of these drivers. In spite of this, the unsustainable vegetation changes observed in this study have a negative impact on rural livelihoods and the management of natural resources in rural areas. This study recommends the implementation of sustainable land use policies that promote land-use practises that support economic growth and development.

Firewood

Land Cover

10.21203/rs.3.rs-2402739/v1

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Citations (1)

Associations of plant functional diversity with carbon accumulation in a temperate forest ecosystem in the Indian Himalayas

Ecological Indicators (2018)

Monika Rawat A. Arunachalam Ayyandar Arunachalam Juha M. Alatalo Rajiv Pandey

Specific leaf area

Temperate forest

Temperate rainforest

Litter

Plant litter

10.1016/j.ecolind.2018.12.005

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Citations (48)

Globally invariant metabolism but density-diversity mismatch in springtails

Nature Communications (2023)

Anton Potapov Carlos A. Guerra Johan van den Hoogen А. Б. Бабенко Bruno Cavalcante Bellini

Soil life supports the functioning and biodiversity of terrestrial ecosystems. Springtails (Collembola) are among the most abundant soil arthropods regulating soil fertility and flow of energy through above- and belowground food webs. However, the global distribution of springtail diversity and density, and how these relate to energy fluxes remains unknown. Here, using a global dataset representing 2470 sites, we estimate the total soil springtail biomass at 27.5 megatons carbon, which is threefold higher than wild terrestrial vertebrates, and record peak densities up to 2 million individuals per square meter in the tundra. Despite a 20-fold biomass difference between the tundra and the tropics, springtail energy use (community metabolism) remains similar across the latitudinal gradient, owing to the changes in temperature with latitude. Neither springtail density nor community metabolism is predicted by local species richness, which is high in the tropics, but comparably high in some temperate forests and even tundra. Changes in springtail activity may emerge from latitudinal gradients in temperature, predation and resource limitation in soil communities. Contrasting relationships of biomass, diversity and activity of springtail communities with temperature suggest that climate warming will alter fundamental soil biodiversity metrics in different directions, potentially restructuring terrestrial food webs and affecting soil functioning.

Functional Diversity

10.1038/s41467-023-36216-6

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Citations (60)

Geographic conditions impact the relationship between plant phenology and phylogeny

The Science of The Total Environment (2024)

Khurram Shahzad Juha M. Alatalo Mengyao Zhu Lijuan Cao Yulong Hao

10.1016/j.scitotenv.2024.174083

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Citations (3)

Scale effects on the relationships between land characteristics and ecosystem services- a case study in Taihu Lake Basin, China

The Science of The Total Environment (2020)

Yang Bai Yuanyuan Chen Juha M. Alatalo Zhangqian Yang Bo Jiang

Ecosystem Management

10.1016/j.scitotenv.2020.137083

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Citations (145)

Community perspectives on conservation of water sources in Tarkeshwar sacred groves, Himalaya, India

Water Science & Technology Water Supply (2021)

Purna Jana Rajiv Pandey Teodoro Semeraro Juha M. Alatalo Roberta Areteno

Abstract Sacred groves have significance in socio-culture and biodiversity conservation. This study evaluated local people's perceptions regarding conservation of sacred groves for water services, through willingness-to-pay (WTP), willingness-to-accept (WTA) and willingness-to-labour-work (DLP). Data were collected through a pre-tested questionnaire from 107 randomly selected households in 18 villages of Uttarakhand. The villages were categorised into 3 classes (core, nearby, faraway) based on proximity to the forests. The contingent-valuation method was used to evaluate WTP [Rs 3,802 (≈$57)] and WTA [Rs 38,224 (≈$571)] for water as an ecosystem service and statistical analyses were performed to evaluate whether factors such as gender, age, household income and location explained differences in the parameters. It was found that gender had a significant impact on WTP, with women having higher WTP, and that location had significant impact on WTA. The result shows that WTA increased with increasing distance from the sacred groves (Rs 43,077 ± 21,139 in faraway villages and Rs 35,323 ± 10,483 in core villages). The results indicated that consideration of gender inequality and education status in villages should be included in planning and decision making about participatory forest management of sacred groves. These findings facilitate forest resource management in mountains and provide guidance for programmes and policies dealing with irrigation, drinking water and community development.

Contingent valuation

Willingness to accept

10.2166/ws.2021.181

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Citations (9)

The next step for China's national park management: Integrating ecosystem services into space boundary delimitation

Journal of Environmental Management (2022)

Shi Xue Zhou Fang Yang Bai Juha M. Alatalo Yang Yang

Contradiction

10.1016/j.jenvman.2022.117086

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Citations (15)

Rural development program in tribal region: A protocol for adaptation and addressing climate change vulnerability

Journal of Rural Studies (2017)

Shashidhar Kumar Jha S. K. Mishra Bhaskar Sinha Juha M. Alatalo Rajiv Pandey

Vulnerability

Adaptive capacity

10.1016/j.jrurstud.2017.02.013

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Citations (57)

Impacts of twenty years of experimental warming on soil carbon, nitrogen, moisture and soil mites across alpine/subarctic tundra communities

Scientific Reports (2017)

Juha M. Alatalo Annika K. Jägerbrand Jaanis Juhanson Anders Michelsen Peter Ľuptáčik

Abstract High-altitude and alpine areas are predicted to experience rapid and substantial increases in future temperature, which may have serious impacts on soil carbon, nutrient and soil fauna. Here we report the impact of 20 years of experimental warming on soil properties and soil mites in three contrasting plant communities in alpine/subarctic Sweden. Long-term warming decreased juvenile oribatid mite density, but had no effect on adult oribatids density, total mite density, any major mite group or the most common species. Long-term warming also caused loss of nitrogen, carbon and moisture from the mineral soil layer in mesic meadow, but not in wet meadow or heath or from the organic soil layer. There was a significant site effect on the density of one mite species, Oppiella neerlandica , and all soil parameters. A significant plot-scale impact on mites suggests that small-scale heterogeneity may be important for buffering mites from global warming. The results indicated that juvenile mites may be more vulnerable to global warming than adult stages. Importantly, the results also indicated that global warming may cause carbon and nitrogen losses in alpine and tundra mineral soils and that its effects may differ at local scale.

Subarctic climate

Soil carbon

10.1038/srep44489

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Citations (63)