Publications by authors named "Pavel Moiseev"
Treelines advance due to climate warming. The impacts of this vegetation shift on plant-soil nutrient cycling are still uncertain, yet highly relevant as nutrient availability stimulates tree growth. Here, we investigated nitrogen (N) and phosphorus (P) in plant and soil pools along two tundra-forest transects on Kola Peninsula, Russia, with a documented elevation shift of birch-dominated treeline by 70 m during the last 50 years.
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- Research discusses how current global climate models are based on air temperatures but fail to capture the soil temperatures beneath vegetation where many species thrive.
- New global maps present soil temperature and bioclimatic variables at 1-km resolution for specific depths, revealing that mean annual soil temperatures can differ significantly from air temperatures by up to 10°C.
- The findings indicate that relying on air temperature could misrepresent climate impacts on ecosystems, especially in colder regions, highlighting the need for more precise soil temperature data for ecological studies.
Article Synopsis
- Climate warming is expected to raise treelines by increasing temperatures and extending the growing season, but there's limited data on how this will affect tree growth on an annual basis.
- A study using tree-ring data from Eurasia and the Americas found that while temperature and growth rates were positively linked during the 20th century, this relationship varies based on tree age and other local factors.
- Future simulations predict that as the growing season continues to lengthen in the 21st century, tree growth may become less reliant on temperature increases, potentially influencing ecosystem dynamics in cold regions and altering responses to climate change.
Even 30 years after the accident, an association between breast cancer incidence and ionizing radiation exposure from Chernobyl fallout remains uncertain. We studied breast cancer incidence in the most contaminated regions of Belarus (Gomel and Mogilev) and Ukraine (Kyiv, Zhytomyr and Chernihiv) before (1978-1986) and after (1987-2016) the accident. Breast cancer cases and female population size data were received from the national cancer registries and the state departments of statistics.
View Article and Find Full Text PDFClimate warming is shifting the elevational boundary between forests and tundra upwards, but the related belowground responses are poorly understood. In the pristine South and Polar Urals with shifts of the treeline ecotone documented by historical photographs, we investigated fine root dynamics and production of extramatrical mycorrhizal mycelia (EMM) along four elevational transects reaching from the closed forest to the treeless tundra. In addition, we analysed elevational differences in climate and vegetation structure, and excavated trees to estimate related changes in the partitioning between below- and aboveground biomass.
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- Climate warming is predicted to boost the growth of woody plants, especially in northern areas where temperatures are usually limited, but this warming affects different regions and plant types differently.
- A study was conducted analyzing the growth responses of junipers and trees (like larch and pine) to rising temperatures over a 5000-km range from Polar to Mediterranean regions.
- The findings revealed that junipers showed better growth than trees in Mediterranean sites, and that tree growth decline in these areas post-1980s was likely due to drought stress influenced by climate change, while junipers remained unaffected.
A new compact satellite spectrometer dedicated to monitoring terrestrial atmospheric ozone (ozonometer) is in preparation for the Russian Geophysics Program. Four instruments at four satellites (Ionosphere) are intended to monitor the total ozone content by measuring spectra of scattered solar radiation in nadir. The spectrometer is based on the Rowland scheme with a concave holographic diffraction grating.
View Article and Find Full Text PDFHigh-altitude treelines are temperature-limited vegetation boundaries, but little quantitative evidence exists about the impact of climate change on treelines in untouched areas of Russia. Here, we estimated how forest-tundra ecotones have changed during the last century along the Ural mountains. In the South, North, Sub-Polar, and Polar Urals, we compared 450 historical and recent photographs and determined the ages of 11,100 trees along 16 altitudinal gradients.
View Article and Find Full Text PDFIn mountainous regions, climate warming is expected to shift species' ranges to higher altitudes. Evidence for such shifts is still mostly from revisitations of historical sites. We present recent (2001 to 2008) changes in vascular plant species richness observed in a standardized monitoring network across Europe's major mountain ranges.
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