scholarly journals Plant Species Composition and Their Conspecific Association in Natural Tropical Rainforest, South Papua

2016 ◽  
Vol 8 (1) ◽  
pp. 33
Author(s):  
Agustinus Murdjoko ◽  
Djoko Marsono ◽  
Ronggo Sadono ◽  
Suwarno Hadisusanto
Keyword(s):  
Plant Species ◽  
Tropical Rainforest ◽  
Detrended Correspondence Analysis ◽  
Life Forms ◽  
Importance Value Index ◽  
Importance Value ◽  
Plant Life Forms ◽  
Plant Life ◽  
Lack Of Information ◽  
Dominant Plant Species

<p>Papua has so many wide lowland areas that cover high diversity in plant from life-forms.  In contrast, there is a lack of information concerning species diversity.  The objectives of the research were to describe species of plant life-forms and described conspecific associations between small individuals and large individuals in natural tropical rainforest, south Papua.  Then, 46 nested plots were placed systematically in natural tropical rainforest of Boven Digoel Regency, Papua.  Density, frequency, dominance and importance value index (IVI) were analyzed to describe plant diversity, while detrended correspondence analysis (DCA) was to describe conspecific association between small individuals and large individuals.  Results found 2040 individuals in this forest consisting 194 plant species.  Those are from pteridophytes, angiosperms and gymnosperms.  The plant life-forms are herbs, orchids, palms, pandans, shrubs, rattans, vines and trees in which of the plant life-forms, trees are the most abundant according to number of species.  In the dominant plant species, two types of conspecific association occurred between small individuals and large individuals.  Analysis of DCA revealed that three are large plant species grow along with their small individuals.  Another type is that small individuals grow far from their large individuals.</p>

Diversité floristique d’un lac du bas-sahara algérien. Flora diversity of a lake at algerian low-sahara

2012 ◽  
Vol 37 ◽  
pp. 33-44 ◽  
Author(s):  
Haroun Chenchouni
Keyword(s):  
Life Forms ◽  
Systematic Sampling ◽  
Phragmites Communis ◽  
Sparse Vegetation ◽  
Plant Life Forms ◽  
Plant Life ◽  
Dominant Plant Species ◽  
Juncus Maritimus ◽  
Adverse Environmental Conditions ◽  
Flora Diversity

Français.  Nous avons examiné la composition et la dynamique de la végétation vasculaire spontanée dans le Lac Ayata (Vallée d’Oued Righ, Bas-Sahara algérien). Le site se situe entre 33°29’17’’N à 33°29’48’’N et 05°59’10’’E à 05°59’37’’E. L’échantillonnage systématique de la flore a révélé l’existence de 13 espèces appartenant à 8 familles et 13 genres. Le plan d’eau est dépourvu de plantes submergées. Les types biologiques, la structure et la physionomie de la végétation sont été déterminés. L’occupation du sol par la végétation est cartographiée afin d’illustrer les répartitions saisonnières des espèces végétales dominantes. Des géostatistiques sur les surfaces occupées par la végétation ainsi que sur sa dynamique saisonnière sont ensuite obtenues puis discutées. Les types biologiques les plus fréquents sont les chamaephytes (53,8%) et les thérophytes (23,1%), qui caractérisent la végétation désertique ayant un recouvrement faible et une hauteur basse. Par ailleurs, la cartographie de la végétation a révélé l’existence de 3 types de formations végétales: (i) une végétation halophytique représentée par des espèces Chénopodiacées qui sont réparties tout autour des abords du plan d’eau; (ii) une végétation hydrophytique représentée par Phragmites communis et Juncus maritimus ; et (iii) une végétation éparse représentée par Limoniastrum guyonianum et Triganum nudatum. Le lac Ayata abrite une flore peu diversifiée mais bien adaptée aux conditions écologiques défavorables qui règnent sur le sol (salinité) et le climat (sécheresse).English. We examined the composition and dynamics of spontaneous vascular vegetation in Lake Ayata (Valley of Oued Righ Algerian, Low-Sahara). The site is located between 33°29’17’’N to 33°29’48’’N and 05°59’10’’E to 05°59’37’’E. A systematic sampling of the flora has revealed 13 species belonging to 8 families and 13 genera. The waterbody is free of submerged plants. The plant life forms, structure and physiognomy of vegetation were determined. In addition, vegetation-land-cover was mapped to illustrate seasonal distribution of dominant plant species. Geostatistics on areas covered by vegetation and its seasonal dynamics were obtained and then discussed. The most common plant life forms were chamaephytes (53.8%) and therophytes (23.1%), which characterize desert vegetation that has low recovery and low height. Furthermore, vegetation mapping revealed the existence of 3 types of vegetation: (i) halophytic vegetation represented mainly by Chenopodiaceae species, which were extended all around the edges of the waterbody; (ii) hydrophytic vegetation represented mainly by Phragmites communis and Juncus maritimus, and (iii) sparse vegetation represented by Limoniastrum guyonianum and Triganum nudatum. Lake Ayata’s flora is poorly diversified but well adapted to adverse environmental conditions prevailing on the ground (salinity) and climate (drought). 

Distribution of plant life forms along an altitudinal gradient in the semi-arid valley of Zapotitlán, Mexico

2000 ◽  
Vol 11 (1) ◽  
pp. 39-42 ◽  
Author(s):  
Numa P. Pavón ◽  
Humberto Hernández-Trejo ◽  
Víctor Rico-Gray
Keyword(s):  
Altitudinal Gradient ◽  
Life Forms ◽  
Plant Life Forms ◽  
Plant Life ◽  
Semi Arid

scholarly journals The role of terrestrial bromeliads in determining the spatial organization of plant life forms in a tropical coastal forest

2017 ◽  
Vol 31 (1) ◽  
pp. 84-92
Author(s):  
Celio M. Lopes ◽  
Flora Misaki ◽  
Karina Santos ◽  
Carlos A. P. Evangelista ◽  
Tatiana T. Carrijo ◽  
...  
Keyword(s):  
Spatial Organization ◽  
Life Forms ◽  
Coastal Forest ◽  
Plant Life Forms ◽  
Plant Life

scholarly journals Plant Life Forms

Nature ◽  
1937 ◽  
Vol 140 (3555) ◽  
pp. 1035-1035
Keyword(s):  
Life Forms ◽  
Plant Life Forms ◽  
Plant Life

scholarly journals Root-shoot interactions and plant life forms.

1983 ◽  
Vol 31 (4) ◽  
pp. 291-303
Author(s):  
E.-D. Schulze
Keyword(s):  
Leaf Area ◽  
Water Uptake ◽  
Transpiration Rate ◽  
Plant Architecture ◽  
Life Forms ◽  
Competitive Growth ◽  
Nutrient Flows ◽  
Plant Life Forms ◽  
Plant Life ◽  
Root:Shoot Ratios

Interactions of water and nutrient flows on C relations are explained and typical features of root:shoot ratios in perennial plants including grasses and woody spp. are discussed. In a hydrostable annual crop plant (cowpea) partitioning was controlled by transpiration rate/leaf area and by the capacity of the root for water uptake. For perennial woody spp. the significance of plant architecture and morphology is demonstrated for a situation of competitive growth. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Quantitative analysis, distributional pattern and species diversity of woody plant species of Lamberi Forest Range, Rajouri, J&K, India

2018 ◽  
Vol 10 (1) ◽  
pp. 522-527
Author(s):  
Jyoti Sharma ◽  
Anil K. Raina
Keyword(s):  
Quantitative Analysis ◽  
Species Diversity ◽  
Plant Species ◽  
Woody Plant ◽  
Diversity Indices ◽  
Distributional Pattern ◽  
Importance Value Index ◽  
Importance Value ◽  
Pinus Roxburghii ◽  
Woody Plant Species

Quantitative analysis, distributional pattern and species diversity of woody plant species of Lamberi Range of Rajouri Forest division, J&K, has been carried out by laying 50 quadrats (10m X 10m size) for trees and 100 quadrats (5m X 5m size) for shrubs. Various phytosociological parameters like frequency, density, abundance, importance value index IVI and diversity indices for trees and shrubs has been used to reveal the plant community structure of the area. The abundance to frequency ratio (A/F) for different species was determined to assess the distribution pattern of the species (regular <0.025, random 0.025-0.05 and contagious >0.05) which indicated the contagious distribution for all the species. Survey of the area revealed presence of 63 woody plant species from the study area comprising of 43 trees and 20 shrubs. Pinus roxburghii (IVI 49.7, Abundance 81.1) and Carissa opaca (IVI 81.12 abundance 7.05) have been recorded as the dominant tree and shrub, respectively, of the area. The computation of diversity indices showed that species richness and evenness i.e Shannon- Weiner’s, Margalef’s and Menhinick’s remained high for trees and low for shrubs. Simpson’s index of dominance was also high for trees. Species which needs priorities for conservation and protection and also required to be monitored have also been highlighted.

scholarly journals Variation and adaptation of leaf water content among species, communities, and biomes

2021 ◽  
Vol 16 (12) ◽  
pp. 124038
Author(s):  
Ruomeng Wang ◽  
Nianpeng He ◽  
Shenggong Li ◽  
Li Xu ◽  
Mingxu Li
Keyword(s):  
Water Content ◽  
Plant Species ◽  
Plant Communities ◽  
Cost Effective ◽  
Terrestrial Ecosystems ◽  
Life Forms ◽  
Systematic Investigation ◽  
Leaf Water ◽  
Leaf Water Content ◽  
Plant Life Forms

Abstract Leaf water content (LWC) is essential for the physiological activities in plants, but its spatial variation and the underlying mechanisms in natural plant communities are unclear. In this study, we measured the LWC of 5641 plant species from 72 natural communities in China, covering most terrestrial ecosystems, to answer these questions. Our results showed that LWC, on average, was 0.690 g g–1, and was significantly higher in forests and deserts than in grasslands. LWC was significantly different among different plant life forms, and ranked on averages in the following order: herbs > shrubs > trees. Interestingly, LWC decreased with increasing humidity and increased in dry environments. Furthermore, the variations of LWC in plant communities were higher in arid areas and those species with lower LWC in a plant community were more sensitive to changing environments. These results demonstrated the adaptations of plants to water regime in their habitats. Although, phylogeny has no significant effect on LWC, plant species both in forests and grasslands evolve toward higher LWC. Variations of LWC from species to community to biome represent the cost-effective strategy of plants, where plant species in drier environment require higher input to keep higher LWC to balance water availability and heat regulation. This systematic investigation fills the gaps on how LWC varies spatially and clarifies the different adaptation mechanisms regulating LWC across scales.

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