Species diversity and its relation with soil factors under different site conditions in a desert-oasis ecotone

2013 ◽  
Vol 5 (3) ◽  
pp. 331
Author(s):  
Xie Ting-Ting ◽  
Su Pei-Xi ◽  
Zhou Zi-Juan ◽  
Li Shan-Jia ◽  
Zhang Hai-Na
Keyword(s):  
Species Diversity ◽  
Site Conditions ◽  
Soil Factors ◽  
Desert Oasis

scholarly journals KEANEKARAGAMAN JENIS TUMBUHAN PAKU-PAKUAN (PTERIDOPHYTA) DAN KONDISI TEMPAT TUMBUHNYA PADA HUTAN RAWA GAMBUT SEKUNDER DAN LAHAN GAMBUT TERBUKA

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Furwoko Kirno ◽  
Dwi Astiani ◽  
Hanna Artuti Ekamawanti
Keyword(s):  
Species Diversity ◽  
Diversity Index ◽  
Similarity Index ◽  
Survey Method ◽  
Site Conditions ◽  
Swamp Forest ◽  
Peat Swamp Forest ◽  
Plot Size ◽  
Peat Swamp ◽  
Index Value

The activities of the community around the peat swamp forest cause disruption of the ecosystem from the sustainability of the forest area's resources. Land clearing and peatland fires also affect the presence of ferns. The new environmental conditions due to changes in land cover cause ferns to be affected by these changes. Kuala Dua Village Kubu Raya Regency has secondary peat swamp forest and open peat land due to fires 3-4 years earlier so it is overgrown with a variety of new types of flora, one of which is a type of fern. The objective of the study is to describe species diversity of ferns and their site conditions in secondary peat swamp forests and open peatlands of Kuala Dua Village, Kubu Raya District. This research was conducted with survey method using multiple plot samples. The plots determination was done by purposive sampling which was taken place on the site where there were many species of ferns land. Three plots were on each land covered condition with a plot size of 5 m x 5 m that divided into 25 of a 1 m x 1 m sub plots. The results show that 5 species of ferns found in peat swamp forest and 4 species of ferns were found on open peatlands. The species that has the highest INP value in the forest was Asplenium belangeri and the species that has the INP value in open peatland was Nephrolefis falcata. Dominant Index, Spesies Diversity Index and Spesies Abudance Index were 0,12 and 0,18; 0,30 and 0,36; 0,51 and 0,52 on the forest and open peatland respectively. The Similarity Index value (IS) of ferns in secondary peat swamp forest and open peatland is 44%. The study shows dissimility of species fern in peat swamp forests and open peatlands.Keywords: Open peatland, Pteridophyta, secondary peat swamp forest

scholarly journals Interactive effects between plant functional types and soil factors on tundra species diversity and community composition

2016 ◽  
Vol 6 (22) ◽  
pp. 8126-8137 ◽  
Author(s):  
Maitane Iturrate-Garcia ◽  
Michael J. O'Brien ◽  
Olga Khitun ◽  
Samuel Abiven ◽  
Pascal A. Niklaus ◽  
...  
Keyword(s):  
Species Diversity ◽  
Community Composition ◽  
Plant Functional Types ◽  
Interactive Effects ◽  
Soil Factors ◽  
Functional Types

The relationships between plant community species diversity and soil factors

2003 ◽  
Author(s):  
Ming Yue ◽  
Linjing Zhang ◽  
Fengxue Gu ◽  
Xiaoling Pan ◽  
Guifang Zhao
Keyword(s):  
Species Diversity ◽  
Plant Community ◽  
Soil Factors

Influence of crop combinations and soil factors on diversity and association of arbuscular mycorrhizal fungi in arecanut based cropping systems

2017 ◽  
Vol 45 (1) ◽  
Author(s):  
K. Ambili ◽  
George V. Thomas ◽  
Murali Gopal Alka Gupta
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Root Colonization ◽  
Cropping Systems ◽  
Cropping System ◽  
Arbuscular Mycorrhizal ◽  
Black Pepper ◽  
Soil Conditions ◽  
Soil Factors ◽  
Spore Load

<p>Arbuscular mycorrhizal (AM) species diversity and extent of association were investigated in arecanut based cropping systems<br />differing in crop combinations. The study was carried out in farmers’ fields under acidic soil conditions at three locations representing<br />low land (Maneikkara), midland (Cheruvanjeri) and high land (Nedumpoyil) regions of Kannur district in Kerala. The cropping<br />systems in Maneikkara, Cheruvanjeri and Nedumpoyil had arecanut-banana, arecanut-banana-black pepper and arecanut-bananablack<br />pepper-cardamom as component crops. AM spore load and root colonization differed significantly in arecanut in the three<br />cropping systems. Highest spore load was recorded in Maneikkara followed by that in Nedumpoyil and Cheruvanjeri regions.<br />Crops which formed components of the cropping system differed in root colonization levels, with banana recording the highest<br />level, followed by arecanut, black pepper and cardamom. Colonization pattern was Paris type in all crops, but varied with respect<br />to predominance of arbuscules in arecanut and vesicles in banana. Arecanut-black pepper-banana system at Cheruvanjeri in<br />midland was superior with respect to species diversity and species richness as evidenced by Shannon–Weiner index (Hs), Simpson’s<br />index of diversity (Ds) and species richness index. Arecanut-banana cropping system in Maneikkara in low land had low level of<br />species diversity and species richness, indicating the combined influence of crop combinations and soil factors such as N and P on<br />AM diversity and distribution. Rhizophagus fasciculatus, Funneliformis geosporum, F. mosseae, Glomus macrocarpum,<br />G. aggregatum, G. multicaule, G. glomerulatum and Acaulospora bireticulata were the AMF species identified from the arecanut<br />cropping systems. F. geosporum was the most abundant (29-50%) species in the cropping system. The relative occurrence and<br />abundance of AM species varied significantly with respect to the crops and locations.</p>

scholarly journals The Influence of Tilia tomentosa Moench on Plant Species Diversity and Composition in Mesophilic Forests of Western Romania–A Potential Tree Species for Warming Forests in Central Europe?

2021 ◽  
Vol 13 (14) ◽  
pp. 7996
Author(s):  
Steffi Heinrichs ◽  
Veronika Öder ◽  
Adrian Indreica ◽  
Erwin Bergmeier ◽  
Christoph Leuschner ◽  
...  
Keyword(s):  
Species Diversity ◽  
Central Europe ◽  
Plant Species ◽  
Tree Species ◽  
Plant Species Diversity ◽  
Site Conditions ◽  
Local Site ◽  
Tilia Tomentosa ◽  
Western Romania ◽  
Local Site Conditions

Climate change challenges important native timber species in Central Europe. The introduction of non-native tree species originating from warmer climates is one option to make Central European forests compatible to global warming. This, however, requires an assessment of the species’ growth requirements, and of its impact on biodiversity in its native ranges. Silver lime (Tilia tomentosa), a moderately drought-tolerant, thermophilous tree species of South-eastern Europe is considered suitable for the future. Along three elevational transects in western Romania, we assessed the impact of changing climate and local site conditions on the abundance of this tree species and contrasted plant species diversity and composition of lime-dominated forests with mesophytic oak and beech forests. Local site conditions and disturbance histories shaped the distribution pattern of silver lime. When dominant, it reduced plant species diversity within stands due to its dense canopy. For shade-tolerant, mesophytic species, though, lime forests provided an additional habitat and extended their range into warmer environments. Thus, silver lime may have the potential as an admixed tree species forming a transitory meso-thermophilous habitat in the future. At the same time, silver lime may be limited under increasing drought frequency.

Diatoms in the Early Valdai (Weichselian) sediments in Lake Ladoga basin

2019 ◽  
pp. 225-228
Author(s):  
Anna V. Ludikova
Keyword(s):  
Species Diversity ◽  
High Energy ◽  
Lake Ladoga ◽  
Diatom Assemblages ◽  
Marine Diatoms ◽  
Selective Preservation

The pioneer diatom study of the Early Weichselian (Valdai) sediments in Lake Ladoga basin was performed. The specifics of the diatom assemblages (co-occurrence of ecologically incompatible taxa, poor species diversity, low diatom concentration and selective preservation) suggest that during the Early Weichselian time intense erosion of previously deposited marine Eemian (Mikulino) sediments prevailed, which resulted in re-deposition of marine diatoms. The sedimentation took place in high-energy environments unfavorable for diatom accumulation and preservation.

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