نتایج جستجو برای: floristic richness

تعداد نتایج: 22915  

Journal: رستنیها 2006
A. GHAHREMAN A.R. NAQINEZHAD, B. HAMZEH’EE F. ATTAR, M. ASSADI,

The Caspian (Hyrcanian) lowland forest zone in northern Iran is characterized by small remnant alder forest communities, dominated or subdominated with an Euxino-Hyrcanian element, Alnus glutinosa ssp. barbata. The first floristic inventory of these alder forests in northern Iran is presented. The floristic catalogue is based on the data of 133 phytosociological releves in eight different alder...

Journal: :Australian Journal of Botany 2022

Context Gravelly pavement herbfields are a rare, geographically restricted community found in high mountain areas of south-eastern Australia. plant communities occur where there is continuous waterflow, with vegetation comprising sparse, semi-aquatic species on rock or gravel substratum. Aims This study aimed to further the understanding Bogong High Plains, Victoria, by asking questions relatin...

2006
Siegmar-W. Breckle

Afghanistan is a very mountainous country. It offers a big variety of ecological conditions, this means a big variety of vegetation types is covering land surface. These vegetation types are consisting of a high biodiversity, since the floristic influence from various neighbour regions is a considerable factor in floristic and vegetation pattern. On the other hand, Afghanistan is a very dry cou...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2013
Hannes Feilhauer Frank Thonfeld Ulrike Faude Kate S. He Duccio Rocchini Sebastian Schmidtlein

Assessing and mapping patterns of (semi-)natural vegetation types at a large spatial scale is a difficult task. The challenge increases if the floristic variation within vegetation types (i.e., subtype variation of species composition) is the target. A desirable way to deal with this task may be to address such vegetation patterns with remote-sensing approaches. In particular data from multispe...

2005
MIRKKA M. JONES HANNA TUOMISTO DAVID B. CLARK

1 Field studies to evaluate the roles of environmental variation and random dispersal in explaining variation in the floristic composition of rain forest plants at landscape to regional scales have yet to reach a consensus. Moreover, only one study has focused on scales below 10 km 2 , where the effects of dispersal limitation are expected to be easiest to observe. 2 In the present study, we es...

2014
Sonia Ciccazzo Alfonso Esposito Eleonora Rolli Stefan Zerbe Daniele Daffonchio Lorenzo Brusetti

The rhizosphere effect on bacterial communities associated with three floristic communities (RW, FI, and M sites) which differed for the developmental stages was studied in a high-altitude alpine ecosystem. RW site was an early developmental stage, FI was an intermediate stage, M was a later more matured stage. The N and C contents in the soils confirmed a different developmental stage with a k...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2016
J C Oliveira I C G Vieira A S Almeida C A Silva

The goal of this study is to analyze the floristic patterns and the structure of disturbed and undisturbed upland forests, in Permanent Preservation Areas (PPAs) along the Moju river, in the Brazilian state of Pará. Trees with a diameter equal to or larger than 10cm at 1.30m from the ground (DBH) ≥10cm were analyzed for the upper stratum. For the middle stratum, individuals with DBH between 4.9...

2017
Hua Zhu

The tropical climate in China exists in southeastern Xizang (Tibet), southwestern to southeastern Yunnan, southwestern Guangxi, southern Guangdon, southern Taiwan, and Hainan, and these southern Chinese areas contain tropical floras. I checked and synonymized native seed plants from these tropical areas in China and recognized 12,844 species of seed plants included in 2,181 genera and 227 famil...

2003
James H Miller

Conservation of biological diversity is an important issue on public and private forests worldwide. As concern for diversity maintenance escalates, more pressure will be placed on the forestry community to understand the efjfects of silvicultural treatments on biodiversity and its sustainable management Biodiversity conservation in intensively managed forested regions will depend (at least part...

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