scholarly journals La vegetación de la Reserva Ecológica Lomas del Seminario, Ajusco, México

2017 ◽  
pp. 77 ◽  
Author(s):  
Beatriz González-Hidalgo ◽  
Alma Orozco-Segovia ◽  
Nelly Diego-Pérez
Keyword(s):  
Floristic Composition ◽  
Actual State ◽  
Vegetation Types ◽  
Vegetation Map ◽  
Secondary Vegetation ◽  
Quercus Forest

The present work was carried out in the Reserva Ecológica Lomas del Seminario, Ajusco, D. F. to know the actual state of the vegetation. Two primary vegetation types were found: arid tropical scrub and Quercus forest as well as two secondary vegetation ones: Quercus scrub Sedum and arid tropical scrub; both associated to Sedum. A vegetation map of the zone is presented. It was determined the floristic composition and the physiognomy and structure of vegetation.

La flore et la végétation de la partie méridionale de l'Archipel des Nouvelles Hébrides

1975 ◽  
Vol 272 (918) ◽  
pp. 329-342 ◽  
Keyword(s):  
Human Population ◽  
New Caledonia ◽  
Cloud Forest ◽  
Active Volcano ◽  
Southern Region ◽  
Vegetation Types ◽  
Mountainous Regions ◽  
Secondary Vegetation ◽  
New Hebrides ◽  
Infertile Soils

The Southern region of the New Hebrides consists of five islands of very different size, clearly separated from and with a cooler climate than the remainder of the archipelago. Only the three largest islands have been studied botanically. These islands are Aneityum and Erromanga, now sparsely populated, where there is still extensive climax vegetation on the deep, infertile soils, and Tanna, with a dense human population, where, except in mountainous regions, there is scarcely anything but secondary vegetation, on generally fertile soils that are periodically rejuvenated by ash showers from a continuously active volcano. The principal vegetation types recognized are: dense Agathis (kauri) - Calophyllum forest; cloud forest, with mosses and ferns, on ridges above 500 m altitude; low forests or thickets with Euphorbiaceae, Hibiscus or Leucaena ; open Acacia spirorbis forest; thickets of Myrtaceae and Vaccinium ; various associations more or less dominated by grasses. The flora, though relatively rich in the New Hebridean context, appears poor in comparison with that of Fiji, to which it is nevertheless fairly closely related, and even poorer in comparison with that of New Caledonia. Its wider affinities are Malaysian.

A Study on Complexity of Major Vegetation Types in China

2013 ◽  
Vol 864-867 ◽  
pp. 2459-2462
Author(s):  
Zong Han Li ◽  
Hua Yong Zhang ◽  
Fei Li ◽  
Xiang Xu
Keyword(s):  
Fractal Dimension ◽  
Vegetation Type ◽  
Alpine Vegetation ◽  
Vegetation Types ◽  
Forest Types ◽  
Vegetation Map ◽  
Tropical Mountains ◽  
The Relationship ◽  
Vegetation Patches ◽  
Dimension Index

In this study, fractal dimension index is applied to describe the complexity of 11 vegetation groups and 5 needle-leaf forest vegetation types in China. Basing on the Vegetation Map of China, we calculate the perimeter and area of vegetation patches with the software ArcGis. The relationship between perimeter and area is established for each vegetation group and vegetation type, and the corresponding fractal dimension index is estimated. The results show that, among the 11 vegetation groups, the Alpine vegetation is the most complex vegetation. In the 5 needle-leaf forest types, the subtropical and tropical mountains needle-leaf forest is the most complex vegetation. It seems that the complexity of vegetation is associated with altitude. The topography may be responsible for the complexity at different scales.

Avifauna in three vegetation types on Mundanthurai Plateau, South India

1994 ◽  
Vol 10 (3) ◽  
pp. 323-335 ◽  
Author(s):  
A. J. T. Johnsingh ◽  
Justus Joshua
Keyword(s):  
Species Diversity ◽  
South India ◽  
Deciduous Forest ◽  
Conservation Status ◽  
Bird Species ◽  
Line Transect ◽  
Vegetation Types ◽  
Secondary Vegetation ◽  
Dry Deciduous Forest ◽  
Bird Species Diversity

ABSTRACTPatterns of bird species diversity within three vegetation types were investigated by the line transect method on Mundanthurai Plateau, South India. Minimum numbers of species and individuals were seen in the study area during July and August. Such seasonal variation was more pronounced in riverine and dry deciduous forest than in the secondary vegetation which was avoided by most of the winter migrants. There was a greater species overlap between riverine and dry deciduous forest than between riverine and secondary vegetation.No relationship could be established between bird species diversity and tree species/foliage height diversity. The secondary vegetation had fewer specialized forest species and more generalists. Larger birds (>200 g) were rare but smaller ones (<50 g) were more common. The paper emphasizes that the conservation status of avifauna in managed forests in India needs to be assessed and monitored.

scholarly journals Trends in plant ecology research in Ethiopia (1969-2019): Systematic analysis

2020 ◽  
Author(s):  
Kflay Gebrehiwot ◽  
Sebsebe Demissew
Keyword(s):  
Invasive Plant ◽  
Meta Analysis ◽  
Floristic Composition ◽  
Plant Ecology ◽  
Flow Diagram ◽  
Vegetation Types ◽  
Systematic Analysis ◽  
Afromontane Forest ◽  
The 1960S ◽  
Plant Ecological

AbstractThe objective of this paper was to systematically analyze the trend of plant ecological research in Ethiopia. The inclusion and exclusion of the articles for analysis were performed using Reporting Standards for Systematic Evidence Syntheses (ROSES) flow diagram developed for systematic review/meta-analysis. The number of articles published, authors, and collaboration has increased dramatically since the 1960s. Most of the research largely focused on the Dry evergreen Afromontane Forest and grassland complex (DAF) and Moist evergreen Afromontane Forest (MAF) vegetation types, comprising of about 52.6%. Of the remaining vegetation types, the woodlands (14.3%) i.e. Acacia-Commiphora woodland and bushland proper (ACW), and Combretum-Terminalia woodland and wooded grassland (CTW), desert and semi-desert scrubland (DSS) (2.3%), and the Afroalpine (AA) and Ericaceous Belt (EB) (1.5%) received little attention. A descriptive study on plant community ecology revolving on floristic composition and community structure is the dominant research theme, which revealed a narrow theme in contrast to the global trend. Other plant ecological studies such as reproductive and dispersal ecology of invasive plant species, and pollination ecology seems largely a neglected topic by the academia. Furthermore, the recommendations forwarded are not result-based. As a future direction, the Ethiopian government should develop a project database both for completed and ongoing projects.

scholarly journals Floristic patterns of the neotropical forests, savannas and scrublands with Trithrinax campestris (Arecaceae) in central Argentina

2021 ◽  
Vol 2 ◽  
pp. 5-18
Author(s):  
Sebastián R. Zeballos ◽  
Marcelo R. Cabido ◽  
Juan J. Cantero ◽  
Alicia T.R. Acosta ◽  
M. Virginia Palchetti ◽  
...  
Keyword(s):  
Vascular Plant ◽  
Floristic Composition ◽  
Fire Frequency ◽  
Vegetation Types ◽  
Neotropical Forests ◽  
Central Argentina ◽  
Partitioning Around Medoids ◽  
Wide Range ◽  
Palm Species ◽  
Floristic Data

Aims: Trithrinax campestris is one of the palm species with the southernmost distribution in the Neotropics. Despite that the vegetation types in which T. campestris occurs are nowadays heavily threatened by land use and land cover changes, their floristic composition and structure are still to be documented. In order to characterize T. campestris habitats, the aim of this study was to describe the floristic composition of the vegetation types in which this palm occurs and their relationships with different environmental factors. Study area: The survey was conducted in central Argentina in an area comprising the southern extreme of the distribution of T. campestris in the following phytogeographic areas: Espinal, Lowland and Mountain Chaco. Methods: Following the Braun-Blanquet approach we collected 92 floristic relevés recording a total of 601 vascular plant species. Vegetation was classified through the ISOPAM hierarchical analysis. Bioclimatic and elevation data were related to the floristic data through the ISOMAP ordination. Remote-sensed images (Landsat TM, ETM+ and OLI) were used to characterize the fire frequency in the 92 stands. Results: Four vegetation types that differed in floristic composition and in diagnostic species were discriminated: 1.1 Celtis tala/Sida rhombifolia closed forest; 1.2 Aspidosperma quebracho-blanco/Prosopis kuntzei open forest; 2.1 Jarava pseudoichu/Vachellia caven open savanna; and 2.2 Acalypha variabilis/Nassella cordobensis scrubland. The ISOMAP ordination showed that differences in floristic composition were related to elevation, topography and climatic variables.Out of the 92 stands, only 21 showed the occurrence of fires during the period 1999–2018. Conclusions: Our results evidenced that vegetation types (forests, savannas and scrublands) comprising T. campestris developed in a wide range of environmental conditions. This is the first study that focuses on all vegetation types in which T. campestris occurs in central Argentina and it is relevant for conservation and sustainable management of the only native palm species in the flora of this part of the country. Taxonomic reference: Catálogo de las Plantas Vasculares del Cono Sur (Zuloaga et al. 2008) and its online update (http://www.darwin.edu.ar). Abbreviations: ISOMAP = isometric feature mapping; ISOPAM = isometric partitioning around medoids.

scholarly journals Liana species composition differs, in spite of trait similarities, in two adjacent forest types in Central Brazil

2017 ◽  
Vol 65 (3) ◽  
pp. 1215 ◽  
Author(s):  
Ana Carolina Souza Brito ◽  
Alexandre Ferraro ◽  
Robyn J. Burnham ◽  
Ângela Lúcia Bagnatori Sartori ◽  
Vivian Almeida Assunção
Keyword(s):  
Species Richness ◽  
Deciduous Forest ◽  
Morphological Characteristics ◽  
Floristic Composition ◽  
Dry Forest ◽  
Forest Fragments ◽  
Vegetation Types ◽  
Forest Types ◽  
Climbing Plants ◽  
Dispersal Syndromes

In the Parana basin, the Serra de Maracaju juxtaposes the Seasonal Dry Forest and the cerradão (a phytophysiognomy of Cerrado), two distinct vegetation types that differ in canopy height, tree density, and composition of the understory. In the same way, these differences may be reflected in the composition of climbing plant species found in these two forest types. Thus, in this study we compared the climbing species in two forest fragments of Serra de Maracaju to understand: (1) Are species richness and floristic composition of climbing plants similar in cerradão and seasonal deciduous forest?, (2) What degree of floristic compositional difference exists between the two vegetation types?, (3) Do the two vegetation types differ significantly in climbing mechanisms, life forms, and dispersal syndromes represented among climbing species? For this, we established and sampled four plots per forest type over 24 months. Species were identified and each one classified, based on three discrete traits. Proportional differences were analyzed using chi-square tests. Our results showed that species richness and floristic composition of climbing plants in the cerradão and the seasonal deciduous forest were not similar. Climber species richness in cerradão was 37 while in the seasonal deciduous forest it was 31; they share only 13 species. Four families, Dioscoreaceae, Fabaceae, Malpighiaceae, and Sapindaceae, included over 60% of the climbing species. The morphological traits most common in both forest types were herbaceous life form, apical twining mechanism, and wind dispersal. Dioscoreaceae was found to be the dominant family, but is the first time to be reported for this condition in Brazil. Bignoniaceae and Passifloraceae ocurred only in the cerradão, and Asteraceae and Combretaceae in the seasonal deciduous forest; some species were found exclusively in a type of forest. Floristic composition of the cerradão and seasonal deciduous forest fragments were substantially different, in spite of physical proximity. However, their climbing species are not statistically distinct in morphological characteristics, possibly due to uniform climatic conditions and the similarity of species because of a shared ancestry (similar families).

scholarly journals Species of the genus Epilobium (Onagraceae) in plant communities in Ukraine

2021 ◽  
Vol 78 (1) ◽  
pp. 3-22
Author(s):  
M.M. Fedoronchuk ◽  
◽  
N.B. Klimovych ◽  
Keyword(s):  
Plant Species ◽  
Plant Communities ◽  
Floristic Composition ◽  
Vegetation Types ◽  
Vegetation Development ◽  
Characteristic Species ◽  
New Habitats ◽  
Class E

To assess the coenotic peculiarities of species of the genus Epilobium (Onagraceae), in particular their coenotic amplitudes in the syntaxa of vegetation of Ukraine, 986 relevés from literature sources were analyzed. The names of syntaxa are provided in accordance with the Prodromus of the vegetation of Ukraine. Species of the genus Epilobium are widely represented in many plant communities and participate in the formation of natural, semi-natural and ruderal coenoses, where they are often diagnostic or characteristic species of associations, alliances, orders and classes of vegetation, or only present in their floristic composition. Epilobium species are present in 28 classes, which is evidence of their broad coenotic amplitudes and representation in different vegetation types: wetland, grassland, halophytic, forest, shrubs, chasmophytic, alpine, and anthropogenic (synanthropic). The widest coenotic amplitudes were revealed in such species as: E. hirsutum, E. palustre, E. angustifolium, E. parviflorum, E. tetragonum, E. montanum, E. alsinifolium, and E. collinum. According to the range of coenotic amplitude, all species can be subdivided into three groups: hemistenotopic, which occur within one class (E. adenocaulon, E. dodonaei, E. lamyi, E. nutans), hemi-eurytopic (within two or three classes) – E. alpestre, E. roseum, and eurytopic (within more than three classes) – E. alsinifolium, E. angustifolium, E. collinum, E. hirsutum, E. montanum, E. palustre, E. parviflorum, E. tetragonum. As for participation of species in the coenosis, the vast majority of them are assectators, and only a small portion can be temporary edificators (in some groups, at certain successive stages of vegetation development: E. angustifolium). Plants of Epilobium species can reproduce rapidly, both vegetatively and by seeds, which promotes their active colonization of new habitats. However, they usually do not tolerate increased shading and coenotic competition with other plant species, so their strategy is mainly ruderal.

scholarly journals Vegetation Map of South Africa, Lesotho and Swaziland 2018: A description of changes since 2006

Bothalia ◽  
2019 ◽  
Vol 49 (1) ◽  
Author(s):  
Anisha Dayaram ◽  
Linda R. Harris ◽  
Barend A. Grobler ◽  
Stephni Van der Merwe ◽  
Anthony G. Rebelo ◽  
...  
Keyword(s):  
South Africa ◽  
Biodiversity Assessment ◽  
Vegetation Types ◽  
Estuarine Ecosystem ◽  
Data Set ◽  
Vegetation Map ◽  
Standard Mapping ◽  
Form Part ◽  
Software Platforms ◽  
Future Work

Background: The Vegetation Map of South Africa, Lesotho and Swaziland (National Vegetation Map [NVM]) is a fundamental data set that is updated periodically. The National Biodiversity Assessment (NBA) 2018 process provided an opportunity for a more comprehensive revision of the NVM and better alignment between the terrestrial, marine and estuarine ecosystem maps.Objectives: The aim of this study was to update the NVM 2018 and quantify spatial and classification changes since NVM 2012, and describe the rationale and data sources utilised. We also quantified spatial errors corrected in this version, highlighted progress since NVM 2006, and identified errors and gaps to make recommendations for future revisions.Method: Edits made to the NVM in ArcMap 10.4 were categorised into the following five groups for analysis: (1) New types, (2) Boundary edits, (3) Realm re-assignment, (4) Removed and replaced vegetation types and (5) Deleted map area. Changes were quantified by category and biome. We used various software platforms to correct and quantify spatial errors since 2006.Results: Vegetation types were added (n = 47), removed (n = 35) and had boundary edits (n = 107) in NVM 2018, which affected over 5% of the total map area, compared to 2.6% (2012) and 0.5% (2009) for previous versions. Several sources of error were identified and fixed, and prompted the development of standard mapping protocols.Conclusion: National Vegetation Map 2018 is the most substantial revision of this data set that now fully aligns with maps of all other realms that form part of the NBA. However, parts of the map remain unrefined and provide opportunities for future work.

scholarly journals A phytosociological reconnaissance of the Mountain Zebra National Park

Koedoe ◽  
1980 ◽  
Vol 23 (1) ◽  
Author(s):  
P. T Van der Walt
Keyword(s):  
South Africa ◽  
National Park ◽  
Vegetation Types ◽  
Vegetation Map ◽  
The Republic

The vegetation of the Mountain Zebra National Park, situated within the Eastern Mixed Karooveld of the Republic of South Africa, was surveyed and analysed according to the Braun-Blanquet phytosociological method of sampling and synthesis. Brief discussions on the phytogeography of the Karoo and the physiography and climate of the Park are included. Three distinct major vegetation types are described floristically, physiognomically and ecologically. A vegetation map of the Park is provided.

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