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1

Factors affecting alien and native plant species richness in temperate nature reserves of Northern China

100%
Zhang X., Wang H., Wang S., Wang R., Wang Y., Liu J.
Polish Journal of Ecology
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2017
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tom 65
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nr 4
Understanding the factors affecting the species richness of alien and native plant is a key issue for predicting the spread of alien species and protecting rare and endangered native species in nature reserves. To investigate the factors affecting alien and native species richness in temperate nature reserves of China, we used a database of 25 nature reserves in Shandong Province of northern China, and studied the relationship of alien and native plant species richness with climatic and anthropogenic factors, as well as area and elevation range. We found that most of the nature reserves in Shandong Province have been invaded by alien plant species. The distribution of alien and native species responds to the same climatic factors, and temperature and precipitation exert strong effects on both groups. Alien and native plant species richness are positively correlated. Human activity is more effective for explaining richness of alien than for native species. Simultaneously, human activity has stronger effects on alien herbaceous than on alien woody plants. Our results suggest that native species richness is mainly explained by climatic factors, whereas alien species richness is mainly explained by climatic factors and human activity together.
2

Invasive Solidago species: how large area do they occupy and what would be the cost of their removal?

100%
Szymura M., Szymura T. H., Wolski K.
Polish Journal of Ecology
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2016
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tom 64
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nr 1
The impact of biological invasions should be considered from ecological and economic perspective. To understand the influence of the invader, both its range and abundance should be known. Even if the range of invaders is well-known, the problem of assessing their abundance still occurs very often. In this study we report the results of an assessment of the area covered by stands of alien Solidago species in Silesia (Central Europe, south-western Poland, area ca. 30 000 km²), and estimated costs of the invaded areas recultivation. The results of field survey show that the stands of invasive Solidago species cover an area of about 130 000 hectares in S-W Poland, which is ca. 4.5% of the total area of the studied region. It was also found that the cadastral data and Corine land cover maps underestimate the area of fallowed agricultural lands. The cost of removing stands of invasive Solidago species in S-W Poland ranges from 123.24 to 266.17 million PLN, depending on the method. The method that balances reasonable costs, low environmental impact and efficiency of grassland establishment costs 180.7 million PLN for S-W Poland.
3

Black cherry (Prunus serotina) invasion in a Scots pine forest: relationships between soil properties and vegetation

100%
Halarewicz A., Pruchniewicz D., Kawalko D.
Polish Journal of Ecology
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2017
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tom 65
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nr 2
Prunus serotina Ehrh. is a rapidly expanding invasive in European temperate forests, threatening native species biodiversity. Three alternative models, ‘the passenger’, ‘the driver’, and ‘the opportunist’ were used to determine the interactions between the invasive species, the native community, and features of the habitat. To assess the relationships between soil properties and species composition of a Scots pine forest invaded by P. serotina, we randomly selected twelve research plots in each of four stands in the south-western part of Poland. We used the phytosociological relevé method and determined selected soil properties (total nitrogen, organic carbon, and pH value) in the organic and humus horizons. Based on redundancy analysis, we determined that selected soil properties explained 38% of the total variation in species composition of the Scots pine forest with P. serotina, indicating that community interactions followed the ‘passenger’ model. At the same time, we found that P. serotina invaded via the ‘driver’ model, since the decrease in soil C:N ratio correlated with black cherry presence, and showed a significant impact on the floristic diversity in the invaded phytocenoses. We conclude that soil parameters seem to facilitate the invasion of P. serotina, and comprise the consequences of this process.
4

Ecological impact of nitrogen fertilization

100%
Wojcik P.
Journal of Fruit and Ornamental Plant Research
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2001
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tom 09
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nr 1-4
5

Agroecological impact of deficient and excessive atmospheric precipitation in Poland (1971-2000)

80%
Zawora T., Ziernicka-Wojtaszek A.
Electronic Journal of Polish Agricultural Universities. Series Environmental Development
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2005
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tom 08
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nr 4
6

Carbon pools and storage along a temperate to boreal transect in Northern Scots pine [Pinus sylvestris] forests

80%
Reed D., Nagel L.
Polish Journal of Ecology
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2003
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tom 51
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nr 4
A significant portion of global terrestrial carbon is stored in forested ecosystems, particularly in systems north of 50°N latitude. Carbon fluxes to and from these systems have the potential to greatly influence global terrestrial C storage, and provide feedback loops in the global carbon cycle. This study examines total ecosystem C storage, and its allocation among ecosystem components, in nine study sites located in Scots pine (Pinus sylvestris) forests located from 50°N (southern Poland) to 70°N (northern Finland). Results indicate a remarkable similarity in total ecosystem C, despite great differences in physical appearance of the overstory. In the long-run, these results do not indicate a great deal of change in total C storage in these systems. The two component C pools that differ the most are the overstory biomass and the organic soil horizons; this raises the concern that these sites could be short-term sources of atmospheric C due to more rapid decomposition in the face of changing climate, but the overstory biomass could be a longer-term, possibly offsetting sink of atmospheric C.
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