scholarly journals Species composition and floristic relationships in southern Goiás forest enclaves

Rodriguésia ◽  
2011 ◽  
Vol 62 (1) ◽  
pp. 123-137 ◽  
Author(s):  
Paulo Oswaldo Garcia ◽  
Arthur Sérgio Mouço Valente ◽  
Daniel Salgado Pifano ◽  
José Felipe Salomão Pessoa ◽  
Luiz Carlos Busato ◽  
...  
Keyword(s):  
Species Composition ◽  
Human Impacts ◽  
Forest Fragments ◽  
Generalist Species ◽  
Central Brazil ◽  
Breast Height ◽  
Savanna Vegetation ◽  
Tree Community ◽  
Analysis Of Similarity ◽  
Forest Remnants

Abstract Hinterland fragments of Atlantic forests situated in transitional areas are poorly known with respect to the effectsof human impacts on their species composition and regeneration. The purpose of this study was to describe andcharacterize the structure and composition of the tree community of forest remnants located in Itumbiara, GoiásState, Central Brazil, and to analyze their floristic relationship with other areas of seasonal and transitionalvegetation ecotones. Five forest fragments were chosen for tree community sampling. The survey was carried outusing PCQ (point-centered quarter) method and 25 points were distributed along linear transects totalling 125sampling units. Four live trees with circumference at breast height (1.30 m) > 15 cm were recorded at each point.The floristic and phytosociological surveys recorded 149 tree species belonging to 110 genera and 47 families.The analysis of similarity confirmed the ecotonal character with many generalist species and other with occasionaloccurrence in 'Cerrado' (woody savanna) and seasonal forests. The forest remnants in Itumbiara showed a hightree species diversity. In spite of this, the tree community species suggests higher similarity with savanna vegetation.

Human Impacts Affect Tree Community Features of 20 Forest Fragments of a Vanishing Neotropical Hotspot

2014 ◽  
Vol 55 (2) ◽  
pp. 296-307 ◽  
Author(s):  
José Aldo Alves Pereira ◽  
Ary Teixeira de Oliveira-Filho ◽  
Pedro V. Eisenlohr ◽  
Pedro L. S. Miranda ◽  
José Pires de Lemos Filho
Keyword(s):  
Human Impacts ◽  
Forest Fragments ◽  
Tree Community

scholarly journals Surveying in highly-modified landscapes to document the occurrence of threatened species: a study of the giant armadillo Priodontes maximus in central Brazil

Oryx ◽  
2018 ◽  
Vol 54 (1) ◽  
pp. 133-139
Author(s):  
Frederico G. Lemos ◽  
Alan N. Costa ◽  
Fernanda C. Azevedo ◽  
Carlos E. Fragoso ◽  
Mozart C. Freitas-Junior ◽  
...  
Keyword(s):  
Threatened Species ◽  
Human Impacts ◽  
Iucn Red List ◽  
Natural Vegetation ◽  
Home Ranges ◽  
Anthropogenic Landscapes ◽  
Conservation Policies ◽  
Central Brazil ◽  
Forest Remnants ◽  
Conservation Actions

AbstractStudies on threatened species in highly modified and unprotected landscapes are necessary for the development of appropriate conservation policies. This is particularly important for species with large home ranges, such as the giant armadillo Priodontes maximus, whose occurrence in anthropogenic landscapes is poorly known despite its categorization as Vulnerable on the IUCN Red List. We searched and surveyed for the giant armadillo within human-modified areas in central Brazil using direct and indirect methods across a wide region dominated by diverse farming environments and scattered remnants of natural vegetation. During a 14-year period (2003–2016), we located 54 records of the species, including three road-kills and two instances of poaching. Most of the occurrence points (83%) were in native vegetation, with 17% in anthropogenic environments (pastures and roads). We confirmed the presence of the giant armadillo within a wide, intensely human-altered region. These findings indicate that Cerrado and Atlantic Forest remnants in modified landscapes in central Brazil play an important role as refuges for this armadillo species. In addition to habitat loss, road-kills and poaching persist as threats to the giant armadillo. Conservation actions are necessary to minimize human impacts and facilitate the persistence of the giant armadillo in this region. Policies that both deter illegal deforestation and strengthen incentives for the protection of natural vegetation remnants and restoration of biological corridors such as gallery forests would aid conservation of the giant armadillo in this area.

scholarly journals The pristine rain forest? Remnants of historical human impacts on current tree species composition and diversity

2003 ◽  
Vol 30 (9) ◽  
pp. 1381-1390 ◽  
Author(s):  
Barend S. van Gemerden ◽  
Han Olff ◽  
Marc P.E. Parren ◽  
Frans Bongers
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Rain Forest ◽  
Human Impacts ◽  
Tree Species Composition ◽  
Forest Remnants

scholarly journals Dragonflies (Odonata) from the Taquari River valley region, Rio Grande do Sul, Brazil

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1740 ◽  
Author(s):  
Samuel Renner ◽  
Eduardo Périco ◽  
Göran Sahlén ◽  
Daniel Martins Dos Santos ◽  
Guilherme Consatti
Keyword(s):  
Species Composition ◽  
Rio Grande ◽  
River Valley ◽  
Forest Fragments ◽  
Agricultural Activities ◽  
Rio Grande Do Sul ◽  
Generalist Species ◽  
Small Streams ◽  
Specialist Species ◽  
Small Forest

A survey of Odonata was carried out in the central region of the state of Rio Grande do Sul: the Taquari River valley. This region was originally covered by deciduous and Semi-deciduous Atlantic Forest, which today only exist in a highly fragmented environment mainly due to agricultural activities. Our survey was conducted in 12 municipalities from this region, between March 2011 and April 2013. Aiming a general overview of the species composition, our sampling sites included lakes, bogs, small streams and river sections, all inside or surrounded by small forest fragments or forest areas. Fifty species of Odonata were collected comprising 29 genera and seven families. The dominant families were Libellulidae (40%) and Coenagrionidae (36%), while Aeshindae, Gomphidae and Lestidae each only comprise 6% of the total number of species. The findings revealed the presence of a highly diverse odonate assemblage, mainly represented by generalist species in human disturbed fragments and a few forest specialist species in the best preserved remnants only.

scholarly journals INFLUENCE OF SOIL AND TOPOGRAPHY ON THE COMPOSITION OF A TREE COMMUNITY IN A CENTRAL BRAZILIAN VALLEY FOREST

2005 ◽  
Vol 62 (1-2) ◽  
pp. 69-90 ◽  
Author(s):  
J. R. R. PINTO ◽  
A. T. OLIVEIRA-FILHO ◽  
J. D. V. HAY
Keyword(s):  
Tree Species ◽  
Mato Grosso ◽  
Central Brazil ◽  
Tree Community ◽  
Topographic Survey ◽  
Species Abundances ◽  
Chief Factors ◽  
Components Analysis ◽  
Upper Slope ◽  
Properties Of Soil

The purpose of the present study was to investigate the correlations between environmental variables related to the substrate (soil and topography) and the distribution of tree species in a valley forest in the Chapada dos Guimarães National Park, Mato Grosso State, Brazil. The forest lies in the Cerrado Domain of Central Brazil where the dominant vegetation cover is cerrado (woody savanna). A survey of the tree community registered all live individuals with circumference at breast height (cbh)≥15cm found in eighteen 600m2 plots (total area 1.08ha). The substrate variables used in the gradient analyses were obtained from a topographic survey and from analyses of the chemical and physical properties of soil samples. A principal components analysis of soil and topography variables and a canonical correspondence analysis of the species–environment relationships produced similar results, separating both the substrate variables and the tree species abundances, mainly according to the two types of bedrock, sandstone or slate, underlying their soils, and secondly to the three topographic sectors recognized: Streamside, Mid Slope and Upper Slope. The differences in soil fertility and texture (related to the bedrocks) and the soil water regime (related to both soil texture and topography) were probably the chief factors determining the distribution of tree species in the forest.

scholarly journals Species composition and diversity of small Afromontane forest fragments in northern Ethiopia

Plant Ecology ◽  
2006 ◽  
Vol 187 (1) ◽  
pp. 127-142 ◽  
Author(s):  
Raf Aerts ◽  
Koen Van Overtveld ◽  
Mitiku Haile ◽  
Martin Hermy ◽  
Jozef Deckers ◽  
...  
Keyword(s):  
Species Composition ◽  
Northern Ethiopia ◽  
Forest Fragments ◽  
Afromontane Forest

scholarly journals Branch elongation and diameter growth were temporally dissociatedin "cerrado" tree species

Hoehnea ◽  
2009 ◽  
Vol 36 (3) ◽  
pp. 437-444 ◽  
Author(s):  
Davi Rodrigo Rossatto
Keyword(s):  
Water Status ◽  
Carbon Assimilation ◽  
Dry Season ◽  
Diameter Growth ◽  
Wet Season ◽  
Dry Period ◽  
Central Brazil ◽  
Branch Growth ◽  
Tree Community ◽  
One Year

Here is a communicating about time differences between branch and diameter growth in a tree community of ten species in Neotropical savanna ("cerrado") of Central Brazil. This work was conducted to study branch expansion and diameter growth in a period of one year between 2006 and 2007. Branch growth had begin in middle dry season and had the peak occurrence during the dry period in September, while diameter growth had begin in late dry season and peaked in the middle of wet season in December. The majority of species followed the same pattern. Branch growth did not have relation with rainfall, while diameter growth had a clear and positive relation with rainfall records. These results suggested that branch growth was not depend on rainfall but only on water status recover, while diameter growth probably depends strongly on water and to carbon assimilation that occurs after branch and leaf expansion.

scholarly journals Distribution of Atta (Hymenoptera - Formicidae) in "terra-firme" rain forest of Central Amazonia: density, species composition and preliminary results on effects of forest fragmentation

1988 ◽  
Vol 18 (3-4) ◽  
pp. 309-315 ◽  
Author(s):  
Heraldo Luís de Vasconcelos
Keyword(s):  
Species Composition ◽  
Rain Forest ◽  
Abundant Species ◽  
Forest Fragments ◽  
Forest Fragment ◽  
Terra Firme ◽  
Atta Sexdens ◽  
Conservation Areas ◽  
Continuous Forest ◽  
Leaf Cutting

One hundred and fourteen hectares of a "terra-fiirme" rain forest 70 km north of Manaus, Amazonas, Brazil, were surveyed for leaf-cutting ant colonies (Atta spp). One half of this area was in isolated forest fragments (surrounded by pastures or second growth) of two sizes: 1 and 10 ha. The other half was in non-isolated fragments (connected to a large parch of forest) of the same sizes. Only two species occured in this forest: Atta sexdens sexdens L. and A. cepfhalotes L. The first was the most abundant species with a mean density of 0.35 colonies per ha. The mean density of A. cephalotes colonies was 0.03 per ha. The density of colonies was not significantly different between the isolated fragments and the continuous forest. Furthermore, the species composition did not change with isolation. However, pre-isolation data and long term monitoring are necessary to conclude that the isolation of a forest fragment has no effect upon Atta colonies. The non-uniform spatial distribution of Atta colonics within the "terra-firme" forest must be taken into account when selecting conservation areas in the Amazon, in order to preserve this important group of ants together with their native habitat.

scholarly journals The contribution of forest remnants within industrial area to threatened mammal conservation: A case study in liquefied natural gas industry in Bontang, Indonesia

2019 ◽  
Vol 20 (8) ◽  
Author(s):  
SUDRAJAT ◽  
MINTORO DWI PUTRO
Keyword(s):  
Natural Gas ◽  
Biodiversity Conservation ◽  
Industrial Area ◽  
Forest Fragments ◽  
Gas Industry ◽  
East Kalimantan ◽  
Forest Remnants ◽  
Natural Gas Industry ◽  
Mammal Conservation

Abstract. Sudrajat, Putro MD. 2019. The contribution of forest remnants within industrial area to endemic and threatened mammal conservation: A case study in liquefied natural gas industry in Bontang, East Kalimantan, Indonesia. Biodiversitas 20: 2257-2265. Tropical forests harbor high biodiversity, while natural protected area is one of the approaches for biodiversity conservation. However, the conversion of natural forests for various purposes has caused forest fragmentation. A novel strategy of conservation is proposed in the form of protected area within industrial estate as the contribution of industrial company in biodiversity conservation. The purpose of this study is to document the endemic and threatened species of mammals existing at two forest fragments with extent of 15 ha and 7.4 ha in a natural gas refinery industry area in Bontang, East Kalimantan and their potential as biodiversity conservation areas. Mammals were monitored at the two forest fragments through direct surveys, trace identification, mist nets, and camera traps. The results of the study show that according to IUCN Red List there were 23 mammal species (belonging to 18 genera, 15 families and six orders) of conservation concern found within the forest fragments including one species is under Critically Endangered, two are Endangered, four are Vulnerable, ten are Least Concern, one is Near Threatened and three are Not Evaluated. Four of those species are considered as endemic, namely Bornean orangutan, Pongo pygmaeus morio, Müller’s gibbon, Hylobates muelleri, Proboscis monkey, Nasalis larvatus and East Bornean slow loris, Nycticebus menagensis. These findings suggest that forest fragments located in the environment of industrial estate can be considered as important conservation strategy if they are well preserved and maintained.

scholarly journals Species composition and structure of parasites component communities of tugun Coregonus tugun (Pallas, 1814) from the Khatanga and Yenisei Rivers

2019 ◽  
Vol 8 (3) ◽  
pp. 72-80
Author(s):  
Kseniya Viktorovna Polyaeva ◽  
Gennady Nikolaevich Dorovskikh ◽  
Yuliya Konstantinovna Chugunova
Keyword(s):  
Species Composition ◽  
Parasite Community ◽  
Shannon Index ◽  
Egg Laying ◽  
Entire Study ◽  
Generalist Species ◽  
Parasite Communities ◽  
Composition And Structure ◽  
Number Of Individuals ◽  
Species Composition And Structure

Tugun Coregonus tugun (Pallas, 1814) is an endemic of Siberia. Information about the species composition and structure of tugun parasite community on the stage of spawning migration is described in this paper. We carried out ichtioparasitologic studies in the Yenisey and the Khatanga Rivers in 2011-2014. Tugun parasite complex from the Khatanga River remains statistically identical in species composition, number of individuals and biomass and differs from those of the Yeniseis tugun over the entire study period. Apparently two different stocks of tugun were investigated in the Yenisei River. One of them lives in the Yeniseis streambed, the other one lives in the Podkamennaya Tunguska River. The composition of the parasitic fauna of tugun from two rivers is formed by generalist species. Tugun parasites component communities from all material collection stations have high values of the Shannon index and two dominant species (by numbers of parasites and by biomass). We found out that the species biomasses differ significantly on the graphic community structure. The description of tugun parasite communities corresponds to characteristic of a climax community on the stage of destruction except the graphic structure. In the analyzed parasitic communities the processes of egg laying and larval appearance, the death of parasites of previous year generation and infection with this year parasites occur simultaneously. The stages of formation and destruction of the community overlap. The described state of tugun parasites communities has an adaptive value. The load on the host body is reduced which ensures the long-term existence of parasites.

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