Mosaic vegetation characteristic of the prehistoric lava fields of the «Hekla» area near Galtaleakur, Iceland

1986 ◽  
Vol 21 (3) ◽  
pp. 243-248 ◽  
Author(s):  
Karl-Georg Bernhardt
Keyword(s):  
Mosaic Vegetation ◽  
Vegetation Characteristic

scholarly journals Potential Applications of GNSS-R Observations over Agricultural Areas: Results from the GLORI Airborne Campaign

2018 ◽  
Vol 10 (8) ◽  
pp. 1245 ◽  
Author(s):  
Mehrez Zribi ◽  
Erwan Motte ◽  
Nicolas Baghdadi ◽  
Frédéric Baup ◽  
Sylvia Dayau ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Signal To Noise Ratio ◽  
Soil Surface ◽  
Satellite System ◽  
Area Index ◽  
Vegetation Height ◽  
Study Sites ◽  
Global Navigation Satellite ◽  
Vegetation Characteristic ◽  
Agricultural Areas

The aim of this study is to analyze the sensitivity of airborne Global Navigation Satellite System Reflectometry (GNSS-R) on soil surface and vegetation cover characteristics in agricultural areas. Airborne polarimetric GNSS-R data were acquired in the context of the GLORI’2015 campaign over two study sites in Southwest France in June and July of 2015. Ground measurements of soil surface parameters (moisture content) and vegetation characteristics (leaf area index (LAI), and vegetation height) were recorded for different types of crops (corn, sunflower, wheat, soybean, vegetable) simultaneously with the airborne GNSS-R measurements. Three GNSS-R observables (apparent reflectivity, the reflected signal-to-noise-ratio (SNR), and the polarimetric ratio (PR)) were found to be well correlated with soil moisture and a major vegetation characteristic (LAI). A tau-omega model was used to explain the dependence of the GNSS-R reflectivity on both the soil moisture and vegetation parameters.

scholarly journals KARAKTERISTIK VEGETASI HABITAT ORANGUTAN (Pongo pygmaeus morio) DI PT. KALTIM PRIMA COAL, KALIMANTAN TIMUR

2019 ◽  
Vol 12 (1) ◽  
pp. 63-72
Author(s):  
Mukhlisi Mukhlisi ◽  
Wawan Gunawan
Keyword(s):  
Diversity Index ◽  
Imperata Cylindrica ◽  
Pongo Pygmaeus ◽  
Forest Fragments ◽  
Cassia Siamea ◽  
Plot Sampling ◽  
Vegetation Characteristic ◽  
Dicranopteris Linearis ◽  
Leea Indica ◽  
Orang Utan

AbstrakOrang utan (Pongo pygmaeus morio) merupakan salah satu primata dilindungi. Sebagian populasinya dapat ditemukan pada Kawasan Reklamasi Pasca Tambang Batubara (KRPT) di PT. Kaltim Prima Coal Sangatta. Penelitian ini bertujuan untuk menganalisis karakteristik vegetasi habitat orang utan di sekitar PT. Kaltim Prima Coal. Metode pengumpulan data vegetasi menggunakan kombinasi jalur berpetak. Hasil penelitian menunjukkan bahwa karakteristik vegetasi habitat orang utan di tiga lokasi KRPT terdiri dari 40 jenis tumbuhan. Sekitar 41-45% di antaranya merupakan jenis tumbuhan yang dimakan oleh orang utan. Nilai indeks keanekaragaman jenis vegetasi (H’) berkisar 1,00-1,09; indeks dominansi (D’) berkisar 0,14-0,40; dan indeks keseragaman (E’) berkisar 0,91-0,99. Vegetasi pada strata pertumbuhan semai dikuasai oleh paku resam (Dicranopteris linearis) dan ilalang (Imperata cylindrica). Strata pertumbuhan pancang cenderung dikuasai oleh jenis Leea indica dan Flemingia congesta. Sementara itu, vegetasi strata pohon dikuasai oleh jenis tanaman reklamasi yaitu Cassia siamea dan Cassia suratensis. Pola regenerasi vegetasi belum berjalan dengan normal, namun proses suksesi telah berjalan dengan hadirnya jenis-jenis alami. Karakteristik vegetasi tidak ideal bagi habitat orang utan. Peningkatan daya dukung habitat perlu dilakukan melalui pengembangan koridor vegetasi antar fragmen hutan tersisa.Abstract Orang utan (Pongo pygmaeus morio) is one of the protected primates. Some of their population might be found in the Mine Closure Area (MCA) at PT. Kaltim Prima Coal Sangatta. The aim of this research was to analyze the characteristics of the vegetation of their habitat at PT. Kaltim Prima Coal. Data was collected by using a combination of line-plot sampling method. The results showed that vegetation characteristic of orang utan habitat in three locations of MCA consisted of 40 plants species, which 41-45% of the plant species were fed by orang utan. Diversity index (H'), dominance index (D') and evenness index (E') were by 1.09-1.00, 0.14-0.40, and 0.91-0.99, respectively. The vegetation on the seedling stage was dominated by Dicranopteris linearis and Imperata cylindrica. The sapling stage was dominated by Leea indica and Flemingia congesta. Meanwhile, the tree stage was dominated by reclamation plants that were Cassia siamea and Cassia suratensis. The regeneration pattern of vegetation has not run normally but the succession process has been starting that indicated by the presence of species naturally. Vegetation characteristics were not ideal for orang utan habitat. Increasing carrying capacity needs to be carried out by developing vegetation corridors among the remaining forest fragments.

scholarly journals GEOLOGICAL AND GEOGRAPHICAL FEATURES OF FORMATION, SEARCH AND PROGNOSIS OF UKRAINIAN AMBER-SUCCINITE

2020 ◽  
pp. 03-10
Author(s):  
V.M. Matsui ◽  
◽  
U.Z. Naumenko ◽  
Keyword(s):  
Late Eocene ◽  
Late Oligocene ◽  
Negative Consequences ◽  
Living Matter ◽  
Sedimentary Deposits ◽  
Early Oligocene ◽  
Geological Processes ◽  
Coastal Marine ◽  
The Baltic ◽  
Vegetation Characteristic

The purpose of this study is to determine the geological and geographical features of the transformation of resin secretions of conifers during the transition from living matter to inanimate (mineral) in the process of several stages of fossilization; formation of succinite-amber placers, as well as substantiation of prognosis assessment of prospects for discovery of new deposits and amber manifestations in the context of their ecologically safe and ecologically expedient extraction. The natural-geographical paleocomplexes of the south-eastern part of the Baltic-Dnieper amber-bearing province in the Eocene-Oligocene are characterized, which caused the accumulation of primary biogenic-sedimentary deposits of resin secretions (proto-amber) and conditions of formation of weeds of different ages. These placers are divided by genesis into indigenous, coastal, marine and estuarine delta and delta of the first intermediate reservoirs, formed in the post-Buchach period - late Middle - Late Eocene and early Oligocene and continental polygenetic placers due to in the late Oligocene, Neogene and Anthropogenic. It has been established that the root source of succinite amber in Ukraine was biogenic sedimentary deposits of resin secretions of vegetation characteristic of the central part of modern Ukraine, while in foreign literature it is believed that the main source of Ukrainian amber is its transfer from Scandinavia by coastal banks or river streams and glaciers from the Baltics. The substantiation of the prognosis of new industrial deposits of amber-succinite discovery in Ukraine is stated. Attention is paid to the problem of development of valuable gem deposits - illegal amber mining, the negative consequences of which are considered as manifestations of natural geological processes.

scholarly journals Mangrove Community Characteristics and Local Fishermen’s Utilization in North Sulawesi Province: Case study on boat raft fishermen in Sauk village, Labuan Uki bay, Bolaang Mongondow regency

2016 ◽  
Vol 4 (2) ◽  
pp. 139
Author(s):  
Ridwan Lasabuda ◽  
Lawrence J. L. Lumingas ◽  
Rose O. S. E. Mantiri
Keyword(s):  
Fishing Ground ◽  
Density Level ◽  
Bruguiera Gymnorrhiza ◽  
Rhizophora Stylosa ◽  
Purposive Sampling ◽  
Rhizophora Apiculata ◽  
Sonneratia Alba ◽  
Mangrove Vegetation ◽  
Avicennia Officinalis ◽  
Vegetation Characteristic

This study aims to analyze the characteristics of mangrove vegetation in Sauk village, Labuan Uki bay, and to know the exploitation activities and the community’s perception on mangrove ecosystem. Mangrove vegetation characteristic data were collected using transect line method in 3 stations, while mangrove utilization and community’s perception data were obtained through field observation, questioners, and structured interviews. Respondent sampling used purposive sampling, and the respondents were representatively selected based on profession background as boat raft fishermen.Results showed that mangroves in Sauk village consisted of 8 species, Avicennia officinalis Aegiceras floridum, Rhizophora apiculata, R. mucronata, R. stylosa, Bruguiera gymnorrhiza, Sonneratia alba, and S. casiolari. The density level was 689 trees.ha-1 (categorized as rare according to the decree of Living Evironment Minister Numbered 201/2004) and the mean vegetation spread was 95.16 M widely available from 22.70 Ha.People used the mangrove for firewood, building materials, boat frame, fish drying place, net dye material (tree skin), dahannya dibuat wadah bunga buatan, and fishing ground. Some people of the village clear cut the mangroves for boat sailing route, despite violating Indonesian Law numbered 27/ 2007 jo Low numbered 1/2014 concerning coastal area and small islands management.Sixty percent of the respondents understood that mangroves can be cut for various benefits, 40% knew that mangrove area is source of income, 40% as source of firewood, 10% as place where fish lay their eggs, and 10% as coast protection from abrasion.Keyword : mangrove, boat raft fishermen, Sauk village, Labuan Uki bay.ABSTRAKPenelitian ini bertujuan untuk   menganalisis karaktersitik vegetasi mangrove yang ada di desa Sauk Teluk Labuan Uki dan  mengetahui aktivitas pemanfaatan serta  persepsi masyarakat tentang ekosistem mangrove. Data karakteristik vegetasi  mangrove diambil menggunakan metode transek line  di 3  stasiun. Sedangkan data pemanfaatan mangrove dan persepsi masyarakat dikumpulkan melalui teknik observasi lapangan, pengisian kuesioner dan wawancara terstruktur. Pengambilan sampel responden menggunakan metode purposive sampling. Responden dipilih secara representatif berdasarkan latar belakang profesi sebagai nelayan bagan perahuHasil penelitian menggambarkan bahwa mangrove yang ada di  desa Sauk terdiri dari 8  spesies : Avicennia officinalis (api-api), Aegiceras floridum (api-api), Rhizophora apiculata (lolaro), Rhizophora mucronata(lolaro), Rhizophora stylosa (lolaro), Bruguiera gymnorrhiza (ting), Sonneratia alba (lolaro)  dan Sonneratia casiolari (posi-posi). Tingkat kerapatan 689 pohon/ha (kategori jarang sesuai Kepmen Lingkungan Hidup No 201 Tahun 2004). Ketebalan vegetasi mangrove rata2 95,16 meter dari luas yang tersedia 22,70 Ha.Masyarakat memanfaatkan mangrove untuk : sumber kayu bakar, dibuat bahan bangunan, dibuat rangka kapal, tempat menjemur ikan, kulitnya sebagai pewarna jaring, dahannya dibuat wadah bunga buatan, tempat menangkap ikan dan biota air lainnya. Selain itu ada oknum masyarakat desa Sauk yang menebang mangrove untuk membuat lintasan perahu,  dimana kegiatan ini bertentangan dengan UU No.27 Tahun 2007 jo UU No.1 Tahun 2014 tentang Pengelolaan Wilayah Pesisir dan Pulau2 Kecil. 60 % responden memahami bahwa mangrove adalah tumbuhan yang bebas ditebang untuk dimanfaatkan berbagai kepentingan. 40 % responden memahami kawasan mangrove adalah sumber pencaharian masyarakat lokal, 40 % responden memahami sebagai sumber untuk mencari kayu bakar, 10 % responden memahami sebagai tempat bertelur ikan, dan 10 % responden memahami sebagai penahan abrasi pantai.Keyword : mangrove, nelayan bagan perahu, desa Sauk, Teluk Labuan Uki

scholarly journals Modeling Canopy Carbon and Water Fluxes Using a Multilayered Model over a Temperate Meadow in Inner Mongolia

2019 ◽  
Vol 14 (1) ◽  
pp. 141-154
Author(s):  
Nina Chen ◽  
Anzhi Wang ◽  
Juan An ◽  
Yushu Zhang ◽  
Ruipeng Ji ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Environmental Factors ◽  
Vapor Pressure ◽  
Inner Mongolia ◽  
Saturated Vapor ◽  
Water Flux ◽  
Growing Season ◽  
Leaf Nitrogen ◽  
Leaf Nitrogen Content ◽  
Vegetation Characteristic

Abstract To incorporate canopy vertical structure in a process-based model over a temperate meadow, a multilayered model estimated canopy carbon flux (Fc) and water flux (LE) was applied by comparing with eddy covariance measurements in Inner Mongolia, China. Simulations of diurnal, seasonal CO2 and H2O fluxes and model sensitivity to parameters and variables were analyzed. The results showed that the model underestimated Fc and LE by about 0.6% and 5.0%, respectively. It was able to simulate the diurnal and seasonal variation of Fc and LE and performed well during the day and in the growing season, but poorly at night and early in the growing season. Fc was more sensitive to the leaf nitrogen content distribution coefficient and maximum catalytic activity of Rubisco, whereas LE showed greater sensitivity to the stomatal conductance parameter a1, empirical coefficient of stomatal response to saturated vapor pressure difference Vpds0, and minimum stomatal conductance of CO2gsc0. The response of Fc to environmental factors was ranked as air CO2 concentration (Ca) > air temperature (Ta) > photosynthetically active radiation (PAR) > soil water content (θsm) > vapor pressure deficit (VPD) > wind speed (u0). The response of LE to environmental factors was ranked as Ta > VPD > θsm> PAR> Ca> u0. The response of LE to vegetation characteristic parameters was greater than that of Fc.

scholarly journals Vegetation of the Hantam-Tanqua-Roggeveld subregion, South Africa Part 2: Succulent Karoo Biome related vegetation

Koedoe ◽  
2008 ◽  
Vol 50 (1) ◽  
Author(s):  
Helga Van der Merwe ◽  
Margaretha W. Van Rooyen ◽  
Noel Van Rooyen
Keyword(s):  
South Africa ◽  
Satellite Images ◽  
Succulent Karoo ◽  
Land Type ◽  
Botanical Diversity ◽  
Mosaic Vegetation ◽  
A Priority ◽  
The Republic ◽  
Western Side ◽  
Floristic Data

The Hantam-Tanqua-Roggeveld subregion lies within the Succulent Karoo Hotspot that stretches along the western side of the Republic of South Africa and Namibia. This project, carried out to document the botanical diversity in the Hantam-Tanqua-Roggeveld subregion, was part of a project identified as a priority during the SKEP (Succulent Karoo Ecosystem Programme) initiative in this Hotspot. Botanical surveys were conducted in an area covering over three million hectares. Satellite images of the area and topocadastral, land type and geology maps were used to stratify the area into relatively homogeneous units. An analysis of the floristic data of 390 sample plots identified two major floristic units, i.e. the Fynbos Biome related vegetation and the Succulent Karoo Biome related vegetation. A description of the vegetation related to the Succulent Karoo Biome is presented in this article. Seven associations, 16 subassociations and several mosaic vegetation units, consisting of more than one vegetation unit, were identified and mapped. Various threats to the vegetation in the region were identified during the survey and are briefly discussed.

scholarly journals The effects of forest fragmentation on the population density and distribution of the globally Endangered Ibadan Malimbe Malimbus ibadanensis and other malimbe species

2005 ◽  
Vol 15 (3) ◽  
pp. 275-285 ◽  
Author(s):  
SHIIWUA MANU ◽  
WILL PEACH ◽  
CHRIS BOWDEN ◽  
WILL CRESSWELL
Keyword(s):  
Forest Fragmentation ◽  
Small Region ◽  
Average Density ◽  
Population Estimate ◽  
Primary Forest ◽  
World Population ◽  
Forest Patches ◽  
Comprehensive Survey ◽  
Vegetation Characteristic ◽  
Almost All

The Ibadan Malimbe Malimbus ibadanensis is a globally Endangered but poorly known forest species endemic to a small region of south-western Nigeria, where almost all forest has been severely fragmented. We carried out the first comprehensive survey of Ibadan Malimbe, and tested whether forest fragmentation is important in determining the distribution of this and related species in south-west Nigerian forest patches. Ibadan Malimbes were found at 19 of 52 sites surveyed but these were all clustered in a relatively small part of what appears to have been the former range. Unlike other malimbes, Ibadan Malimbes were less abundant in, or absent from, relatively isolated forest patches. Red-headed Malimbe M. rubricollis, Red-vented Malimbe M. scutatus and Crested Malimbe M. malimbicus were significantly more abundant in forest patches that retained vegetation characteristic of primary forest (i.e. tall trees and high tree densities). The average density of Ibadan Malimbes was 0.22 birds/ha (95% confidence limits (CL): 0.14–0.34) across all sites, but varied with degree of isolation, with densities of 0.06 birds/ha (0.03–0.14) in the 50% of fragments that were most isolated, compared with 0.33 (0.19–0.56) in the 50% of fragments that were least isolated. This gives a population estimate of 2,469 individuals (1,401–4,365) for the remaining potentially occupied forest area of 112 km2. Given that our survey covered most forest patches within the majority of the historical range of Ibadan Malimbe this can probably be considered a reasonable maximum world population estimate. Ibadan Malimbes appear to be restricted to a small number of relatively small forest patches most of which are highly vulnerable to further destruction, degradation and fragmentation. Conservation effort should urgently focus on the protection of currently occupied sites and increasing the number and extent of forest patches within and around the existing range.

scholarly journals Patterns of seedling recruitment in experimental gaps on mosaic vegetation of abandoned meadows

2011 ◽  
Vol 73 (4) ◽  
pp. 343-350 ◽  
Author(s):  
Lidia Borkowska
Keyword(s):  
National Park ◽  
Seedling Recruitment ◽  
Salix Cinerea ◽  
Carex Acutiformis ◽  
Mosaic Vegetation ◽  
Species Pattern ◽  
Experimental Gaps

The paper presents results of a study on the response of species growing in experimental gaps in the patches dominated by <em>Carex acutiformis</em>, <em>C. cespitosa</em> and <em>Salix cinerea</em>. The study was performed in a meadow area subjected to the process of succession in the Reski Range in the Białowieski National Park. Four patterns of seedlings recruitment in the experimental gaps were distinguished: pattern I - great number of seedlings with high richness of species, pattern II - great number of seedlings with low richness of species, pattern III - low number of seedlings with great richness of species and pattern IV - low number of seedlings with low richness of species.

scholarly journals Combined dermatological pathology complicated by Gottron’s carcinoid papillomatosis

2020 ◽  
Vol 4 (10) ◽  
pp. 652-658
Author(s):  
M.M. Tlish ◽  
◽  
N.L. Sycheva ◽  
V.V. Starostenko ◽  
O.A. Sidorenko ◽  
...  
Keyword(s):  
Lichen Planus ◽  
Autoimmune Thyroiditis ◽  
Clinical Picture ◽  
Clinical Case ◽  
Pathological Process ◽  
Puva Therapy ◽  
Pathogenetic Mechanism ◽  
Skin Biopsies ◽  
Vegetation Characteristic ◽  
Russian Medical

Combined pathology is quite common and relevant in dermatology, but at the same time it is insufficiently studied. There is a few available literature data on the multimorbidity of immune-dependent dermatitis. The article presents a clinical case of a patient with diseases united by a common pathogenetic mechanism (vitiligo, lichen planus (LP), autoimmune thyroiditis) and then subjected to a causality transformation with the Gottron’s carcinoid papillomatosis (GCP) development at sites of occurred dermatoses. Papillomatous projections and vegetation characteristic of CGP almost completely replaced the original papular rash characteristic of lichen planus. It changed the clinical picture of the main pathological process, complicated its course, which in turn caused difficulties in timely diagnosis. Clinical and histomorphological examinations of skin biopsies were performed to verify the diagnosis. Histologically, GCP was manifested by epidermal pseudoepitheliomatous hyperplasia at the site lichen planus and vitiligo foci. This clinical case is of interest due to the rare combination of lichen planus with vitiligo in the setting of autoimmune thyroiditis; it confirms the previously expressed assumptions about the possibility of immune-dependent diseases combination. KEYWORDS: multimorbidity, vitiligo, lichen planus, Gottron’s carcinoid papillomatosis, autoimmune thyroiditis, histology, PUVA therapy, cryolysis. FOR CITATION: Tlish M.M., Sycheva N.L., Starostenko V.V. et al. Combined dermatological pathology complicated by Gottron’s carcinoid papillomatosis. Russian Medical Inquiry. 2020;4(10):652–658. DOI: 10.32364/2587-6821-2020-4-10-652-658.

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