Lignin characteristics in soil profiles in different plant communities in a subtropical mixed forest

2017 ◽  
Vol 11 (4) ◽  
pp. 560-568 ◽  
Author(s):  
Xinggang Wang ◽  
Qiuxiang Tian ◽  
Qianxi Li ◽  
Chang Liao ◽  
Mei He ◽  
...  
Keyword(s):  
Plant Communities ◽  
Mixed Forest ◽  
Soil Profiles ◽  
Lignin Characteristics

scholarly journals Plant communities, properties, and age of organic soils in the post-extraction sites of the Trzcińskie Mokradła Peatland (Sudetes Mts., SW Poland)

2016 ◽  
Vol 67 (2) ◽  
pp. 79-87
Author(s):  
Maria Andrzejczak ◽  
Adam Bogacz ◽  
Klara Tomaszewska ◽  
Magda Podlaska
Keyword(s):  
Plant Communities ◽  
Floristic Composition ◽  
Organic Soils ◽  
Soil Profiles ◽  
Forming Process ◽  
Peat Extraction ◽  
The Past ◽  
Sw Poland ◽  
Plant Habitat ◽  
The Impact

Abstract The aim of the study was to show the impact of the peat extraction on the development and properties of organic soils and plant habitat in post-extraction sites. The study was conducted in the complex of the Trzcińskie Mokradła Peatlands (Sudetes Mts., SW Poland). The Trzcińskie Mokradła Peatlands began to form in Preboreal (10960–9330 ±50BP) so that they are one of the oldest peatlands in the Sudetes. We analyzed 8 soil profiles (42 samples). Peat forming process there is still active in the moderate or strong degree (PtII-PtIII). The floristic composition of the studied areas was typical of transition peatlands. Successive dry and moist periods were observed in the developed of organic soils. The time gaps in peat profiles covering hundreds of years prove their extraction in the past.

Native vegetation of coastal floodplains ? a diagnosis of the major plant communities in New South Wales

2005 ◽  
Vol 11 (2) ◽  
pp. 81 ◽  
Author(s):  
David A. Keith ◽  
Judith Scott
Keyword(s):  
Plant Communities ◽  
Vascular Plant ◽  
Mixed Forest ◽  
Distribution Patterns ◽  
Spatial Arrangement ◽  
Ecological Communities ◽  
Weed Invasion ◽  
Eucalypt Forest ◽  
Acid Sulphate Soils ◽  
Hunter Region

Coastal floodplains are among the most modified landscapes in southeastern Australia. We used available vegetation survey data for coastal alluvium and other unconsolidated Quarternary sediments to construct a diagnosis of the major plant communities and document their flora. We used soil landscape maps and historical portion plans to gain an understanding of the distribution and environmental relationships of the communities. The flora of coastal floodplains includes more than 1 000 native vascular plant taxa and more than 200 introduced taxa. The introduced flora is likely to be considerably larger, given that sampling was biased toward the least disturbed sites. Six major plant communities were diagnosed including a rainforest found north from the Shoalhaven floodplain, a mixed forest of eucalypts and melaleucas found north from Jervis Bay, a casuarina forest (sometimes with melaleuca) found throughout the coast, one open eucalypt forest found principally south from the Hunter region, another open eucalypt forest found north of the Hunter region and a complex of treeless wetland assemblages scattered throughout the coast. The extent and spatial arrangement of these communities varies between floodplains, with landform, rainfall, water regime and soil properties including moisture, fertility and salinity thought to be important factors mediating their distribution patterns. All six assemblages are listed as Endangered Ecological Communities under Threatened Species legislation. The coastal floodplain communities continue to be threatened by land clearing and crop conversion, fragmentation, changes to water flows, flooding and drainage, input of polluted runoff, weed invasion, activation of acid sulphate soils, climate change and degradation through rubbish dumping and other physical disturbances.

scholarly journals Fire rather than nitrogen addition affects understory plant communities in the short term in a coniferous‐broadleaf mixed forest

2018 ◽  
Vol 8 (16) ◽  
pp. 8135-8148 ◽  
Author(s):  
Mengjun Hu ◽  
Yanchun Liu ◽  
Zhaolin Sun ◽  
Kesheng Zhang ◽  
Yinzhan Liu ◽  
...  
Keyword(s):  
Plant Communities ◽  
Mixed Forest ◽  
Nitrogen Addition ◽  
Short Term ◽  
Understory Plant ◽  
Understory Plant Communities

Origine et évolution du marais tourbeux de Keswick, Ontario, par l'analyse pollinique et macrofossile

1986 ◽  
Vol 23 (8) ◽  
pp. 1145-1155 ◽  
Author(s):  
H. Dinel ◽  
P. J. H. Richard ◽  
P. E. M. Levésque ◽  
A. Larouche
Keyword(s):  
Plant Communities ◽  
Mixed Forest ◽  
Climatic Conditions ◽  
Vegetation Changes ◽  
Silty Clay ◽  
Field Site ◽  
Deciduous Species ◽  
Hardwood Species ◽  
History Of ◽  
Lake Simcoe

The objectives of the present study were to explain the origin and to reconstitute the different phases of the paleovegetation of the Keswick marsh, Ontario. Palynological evidence was used to key out the regional and extra-local paleovegetation, and macrofossils analysis served to establish the history of the vegetation at the field site. The data showed that in the vicinity of Lake Simcoe the origin of the marsh was closely associated with the changes in the climatic conditions that favored the development of an environment suitable for peat-forming plant communities; 2.4 m of peat accumulated in the last 4000 years on a washed silty clay. The macrofossils of hardwood species, seeds of Aralia racemosa, and sporangia of Polypodiaceae at the base of the deposit indicated that a mixed forest, composed mainly of deciduous species surrounded by tamaracks, prevailed prior to the initiation of peat accumulation. Furthermore, additional vegetation changes occurred, notably the replacement of an arboreal swamp vegetation by an herbaceous marsh, followed by a shrub–herb marsh and then an herbaceous marsh, recently drained and cultivated.

Weed plant communities of orchards in Siwa Oasis, Egypt

1994 ◽  
Vol 105 (5-6) ◽  
pp. 387-398
Author(s):  
M. M. Abd El-Ghani
Keyword(s):  
Plant Communities ◽  
Weed Plant
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