Sedimented Organic Nitrogen Isotopes in Freshwater Wetlands Record Long-Term Changes in Watershed Nitrogen Source and Land Use

2006 ◽  
Vol 40 (9) ◽  
pp. 2910-2916 ◽  
Author(s):  
Emily M. Elliott ◽  
Grace S. Brush
Keyword(s):  
Land Use ◽  
Nitrogen Source ◽  
Organic Nitrogen ◽  
Nitrogen Isotopes ◽  
Freshwater Wetlands ◽  
Long Term Changes

scholarly journals The consequences for stream water quality of long-term changes in landscape patterns: Implications for land use management and policies

2021 ◽  
Vol 109 ◽  
pp. 105679
Author(s):  
António Carlos Pinheiro Fernandes ◽  
Lisa Maria de Oliveira Martins ◽  
Fernando António Leal Pacheco ◽  
Luís Filipe Sanches Fernandes
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Stream Water ◽  
Landscape Patterns ◽  
Land Use Management ◽  
Stream Water Quality ◽  
Long Term Changes

scholarly journals Long- and Short-Term Changes of the Structure of Macrophytes in Lake Piaseczno in Relation to Land Use in the Łęczna-Włodawa Lakeland (Poland)

2013 ◽  
Vol 15 (2) ◽  
pp. 101-110
Author(s):  
Joana Sender ◽  
Weronika Maślanko
Keyword(s):  
Land Use ◽  
Aquatic Plants ◽  
Short Term ◽  
Main Interest ◽  
Central European ◽  
Macrophyte Communities ◽  
Long Term Changes ◽  
Very High ◽  
Macrophyte Structure

ABSTRACT The Łęczna-Włodawa Plain, known also as the Łęczna-Wlodawa Lakeland, lies within the territory of the largest subregion of the Polesie region, covering over 1,300 km2. The main interest of the Łęczna-Włodawa Lakeland is that it is the oldest in the Central European Lowlands group of about 68 lakes. Among such a large number of lakes there exist all trophic types. However, since the late 1950’s, enormous dynamics of change associated with the disappearance of oligo- and mesotrophic lakes and their transformation into eutrophic, even hypertrophic, lakes have been observed. One of the biocenotic elements of the lakes, which are indicators of these changes, is aquatic plants. The aim of this study was to determine the macrophyte structure of Piaseczno Lake and changes of land use in its surroundings. Piaseczno Lake still represents very high natural values. A reduction in the number of macrophyte communities, which occurred especially in 2008, was a consequence of the fast-growing recreation infrastructure. From 1976 until 2010 an area of recreation infrastructure in the studied area increased more than 3.5 times, and in the built-up area more than five times, as well as a doubling of the total length of the roads. Meanwhile the surface area of wetlands and peatbogs significantly decreased - more than 11 times. Long-term changes in the structure of the macrophyte communities show that the number of communities has varied in each year, probably as a consequence of changes in landuse. Analysis showed changes to the surfaces inhabited by macrophytes, which have decreased significantly over only four years, by more than 25%. However, the proportion of rush communities has increased.

Long-term changes in soil aggregation comparing forest and agricultural land use in different Mediterranean soil types

Geoderma ◽  
2014 ◽  
Vol 235-236 ◽  
pp. 290-299 ◽  
Author(s):  
Katarína Chrenková ◽  
Jorge Mataix-Solera ◽  
Pavel Dlapa ◽  
Victoria Arcenegui
Keyword(s):  
Land Use ◽  
Agricultural Land ◽  
Soil Aggregation ◽  
Soil Types ◽  
Agricultural Land Use ◽  
Long Term Changes ◽  
Mediterranean Soil

scholarly journals Relative importance of long‐term changes in climate and land‐use on the phenology and abundance of legume crop specialist and generalist aphids

2018 ◽  
Vol 26 (5) ◽  
pp. 881-896 ◽  
Author(s):  
Martin Luquet ◽  
Maurice Hullé ◽  
Jean‐Christophe Simon ◽  
Nicolas Parisey ◽  
Christelle Buchard ◽  
...  
Keyword(s):  
Land Use ◽  
Relative Importance ◽  
Legume Crop ◽  
Long Term Changes

Changes in the nitrogen content and pH of the mobilong clay as influenced by land use

1959 ◽  
Vol 10 (5) ◽  
pp. 637 ◽  
Author(s):  
JS Russell ◽  
DL Harvey
Keyword(s):  
Land Use ◽  
Nitrogen Content ◽  
Organic Nitrogen ◽  
Inverse Relation ◽  
Land Use Pattern ◽  
Nitrogen Levels ◽  
Probable Effect ◽  
Irrigation Drainage ◽  
Made In

The surface horizons of 40 profiles of the Mobilong clay hare been analysed for total nitrogen and pH, and the analyses compared with similar ones made in 1929. Soils which were originally high in nitrogen have declined, those with medium levels hare remained substantially the same, arid those which were originally low have increased in nitrogen content. The Mobilong clay thus appears to be approaching an equilibrium nitrogen content which under the present land use pattern of irrigation, drainage, and management approximates to 0.50 per cent. nitrogen. It seems probable that further declines will occur in the nitrogen content of those soils which are greatly in excess of this value, though at a slower rate than formerly. On the other hand increases in the nitrogen content of those soils with values less than this should occur. The implications of these changes, both in relation to future land use practices and in relation to general concepts regarding the effect of grass-legume pastures on soil nitrogen levels, are discussed. Changes in pH were found to ha essentially in inverse relation to the changes in nitrogen. Thus soils which have decreased in organic nitrogen have increased in pH, and vice versa. The probable effect of flooding and subsequent deposition on long term changes in the Mobilong clay is discussed.

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