Spatial distribution and interannual dynamics of tree seedlings at different successional stages in a conifer and broad-leaved mixed forest in Jiaohe,Jilin Province,China

This study was designed to determine whether fallen logs were a more favourable habitat for tree species establishment than soil in moist eucalypt forest in Tasmania, whether establishment success on logs varied between two forests in contrasting environments, and whether surface and substrate qualities and light conditions were associated with establishment success. Data on tree and shrub species densities and heights by species, moss cover, litter cover, Blechnum wattsii cover, canopy cover, bulk density of the substrate, and substrate surface pH, nitrogen content and phosphorus content were obtained from paired soil and log quadrats. Tree seedlings were found to be significantly more abundant on fallen logs than on adjacent ground at both sites, with the differences being greater at the moister Tahune site than at Mount Field. At Tahune, logs significantly differed from adjacent soil in canopy cover, litter cover, moss cover Blechnum wattsii cover, pH and slope. At Mount Field, there were significant differences between logs and soil in litter cover, moss cover, pH, bulk density and nitrogen. Litter cover may be critical in explaining the superior establishment of trees on logs rather than soil in Tasmanian mixed forest, although the possible impacts of variations in bioturbation and root competition require further research.

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Archaeal Assemblages Inhabiting Temperate Mixed Forest Soil Fluctuate in Taxon Composition and Spatial Distribution over Time

Archaea ◽

10.1155/2013/870825 ◽

2013 ◽

Vol 2013 ◽

pp. 1-12 ◽

Cited By ~ 8

Author(s):

Colby A. Swanson ◽

Marek K. Sliwinski

Keyword(s):

Spatial Distribution ◽

Forest Soil ◽

Spatial Scales ◽

Mixed Forest ◽

Rrna Gene ◽

Taxonomic Rank ◽

Time Points ◽

Temperate Mixed Forest ◽

Taxon Composition ◽

Over Time

This study explored the persistence and spatial distribution of a diverse Archaeal assemblage inhabiting a temperate mixed forest ecosystem. Persistence under native conditions was measured from 2001 to 2010, 2011, and 2012 by comparison of 16S rRNA gene clone libraries. The Archaeal assemblages at each of these time points were found to be significantly different (AMOVA,P<0.01), and the nature of this difference was dependent on taxonomic rank. For example, the cosmopolitan genus g_Ca.Nitrososphaera (I.1b) was detected at all time points, but within this taxon the abundance of s_SCA1145, s_SCA1170, and s_Ca.N. gargensis fluctuated over time. In addition, spatial heterogeneity (patchiness) was measured at these time points using 1D TRFLP-SSCP fingerprinting to screen soil samples covering multiple spatial scales. This included soil collected from small volumes of 3 cubic centimeters to larger scales—over a surface area of 50 m2, plots located 1.3 km apart, and a separate locality 23 km away. The spatial distribution of Archaea in these samples changed over time, and while g_Ca.Nitrososphaera (I.1b) was dominant over larger scales, patches were found at smaller scales that were dominated by other taxa. This study measured the degree of change for Archaeal taxon composition and patchiness over time in temperate mixed forest soil.

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Spatial distribution of sandy desertification change in the west of Jilin Province

Journal of Geographical Sciences ◽

10.1007/bf02837514 ◽

2003 ◽

Vol 13 (3) ◽

pp. 379-384 ◽

Cited By ~ 1

Author(s):

Liu Huiqing ◽

Xu Jiawei ◽

L. V. Xinmiao

Keyword(s):

Spatial Distribution ◽

Jilin Province ◽

Sandy Desertification ◽

The West

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Patchiness and Spatial Distribution of Laccase Genes of Ectomycorrhizal, Saprotrophic, and Unknown Basidiomycetes in the Upper Horizons of a Mixed Forest Cambisol

Microbial Ecology ◽

10.1007/s00248-005-5047-2 ◽

2005 ◽

Vol 50 (4) ◽

pp. 570-579 ◽

Cited By ~ 77

Author(s):

Patricia Luis ◽

Harald Kellner ◽

Bettina Zimdars ◽

Uwe Langer ◽

Francis Martin ◽

...

Keyword(s):

Spatial Distribution ◽

Mixed Forest ◽

Laccase Genes

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Delimitating the Ecological Spaces for Water Conservation Services in Jilin Province of China

Land ◽

10.3390/land10101029 ◽

2021 ◽

Vol 10 (10) ◽

pp. 1029

Author(s):

Huan Wang ◽

Chao Zhang ◽

Li Li ◽

Wenju Yun ◽

Jiani Ma ◽

...

Keyword(s):

Spatial Distribution ◽

Water Conservation ◽

Water Retention ◽

Jilin Province ◽

Water Yield ◽

Absolute Amount ◽

Water Retention Capacity ◽

Retention Capacity ◽

Study Results ◽

Total Study Area

Mastering the spatial distribution of water retention capacity and scientifically delineating the ecological space for water conservation are of great significance to the management of regional land and water resources. In this paper, a water conservation ecological spatial delimitation framework suitable for water-deficient areas was put forward. The water retention capacity of the study area in 1983, 1990, 2000, 2010, and 2016 was evaluated by using the InVEST Water Yield model and water balance method, respectively. On this basis, a flexible inflection point model based on the contribution degree of functional units was established. Then the ecological space for water conservation was delimited. The framework was applied to the delimitation of the key water conservation areas in Jilin province, China. The results showed that: (1) the spatial distribution pattern of water conservation in Jilin province gradually decreased from east to west. The spatial difference was significant. The maximum value of water conservation in Jilin province was 730 mm. From 1983 to 2016, water conservation, which accounted for 75.71% of the area, showed an upward trend. The overall water retention capacity showed the characteristics of the overall increase and the local decline. (2) From the absolute amount of the effect of unit area change on water conservation, the intensity from the high to the low was forestland, cultivated land, grassland, unused land, buildings, and water. (3) The area of water conservation less than 474 mm accounted for more than 80% of the total study area. The overall water retention capacity was low. High importance ecological space area of water conservation was comprehensively defined as 36.97%, which was mainly distributed in the natural forest area of Changbai Mountain in the east and the south of Song Liao Plain. Therefore, this study provided a basic layout of relatively concentrated ecological spatial distribution for water conservation types at different levels in Jilin province. The study results and conclusions of this paper will provide a reference for water conservation assessment and the regional land’s natural resources management.

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