Phytosociological study of a riverine forest remnant from Taquari river, State of Rio Grande do Sul, Brazil

ABSTRACT Aiming to characterize the structure of the arboreal community in a riverine forest remnant of the Taquari river, State of Rio Grande do Sul, 42 sampling units of 100 m2 (10 × 10 m) were located. Phytosociological parameters were also assessed and the indexes of Shannon diversity (H') and Pielou evenness (J) were evaluated. A total of 39 species, 21 families, 2.83 nats ind-1 for H' and 0.77 for J were recorded. Among the species found, the endemic Callisthene inundata O.L. Bueno, A.D. Nilson & R.G. Magalh. and Picrasma crenata (Vell.) Engl. are included in the list of endangered species. The density found was of 1,557.14 ind ha-1. Luehea divaricata Mart. and Lonchocarpus nitidus Benth. showed the highest indexes of importance values. Besides contributing to the knowledge of species distribution and community structure, this study points out the need for conservation of existing native forest remnants.

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Illustrated guide to Pentatominae (Hemiptera: Pentatomidae) species associated with the four main grain crops in Rio Grande do Sul state, Brazil

Zootaxa ◽

10.11646/zootaxa.4958.1.27 ◽

2021 ◽

Vol 4958 (1) ◽

pp. 430-478

Author(s):

LURDIANA D. BARROS ◽

MARCELO R. PAIM ◽

VERÔNICA KREIN ◽

VICTOR CARABAJAL ◽

MARCELA N. BRANDÃO ◽

...

Keyword(s):

Species Distribution ◽

New Records ◽

Species Recognition ◽

Rio Grande ◽

Economic Importance ◽

Stink Bugs ◽

Rio Grande Do Sul ◽

Distribution Maps ◽

Grain Crops ◽

Scientific Collections

Several stink bugs in the subfamily Pentatominae are crop pests or have the potential to damage plants of economic importance. In the Brazilian state of Rio Grande do Sul, where agriculture plays a major role in the economy, the knowledge about pest stink bugs is fragmented and, in some instances, outdated. This work provides a summary of Pentatominae species recorded in Rio Grande do Sul feeding on the four most important grain crops for the state, i.e. soybean, rice, maize, and wheat, plus canola, an emerging crop. This survey is enhanced with new records from scientific collections, a short diagnosis for each species, distribution maps, an identification key, and carefully illustrated to allow for species recognition in the field. With this work, we aim to reunite the scattered knowledge of the group in one single revision, and provide a useful tool for identifying the pest stink bugs of Rio Grande do Sul.

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Adesmia subtropicalis (Leguminosae, Papilionoideae, Dalbergieae), a new endangered species from the Brazilian Pampas

Phytotaxa ◽

10.11646/phytotaxa.521.3.7 ◽

2021 ◽

Vol 521 (3) ◽

pp. 219-226

Author(s):

THIAGO COBRA E MONTEIRO ◽

JOÃO RICARDO VIEIRA IGANCI ◽

SILVIA T.S. MIOTTO ◽

ANA PAULA FORTUNA-PEREZ

Keyword(s):

New Species ◽

Endangered Species ◽

Related Species ◽

Conservation Status ◽

Rio Grande ◽

Rio Grande Do Sul ◽

Closely Related Species ◽

Taxonomic Review

In the context of an ongoing taxonomic review of Adesmia subg. Adesmia ser. Bicolores, a new endangered species endemic to Rio Grande do Sul state, Brazil, is herein described. The new species present a long glandular ochraceous indumentum, flowers 10–15 mm long, and arilated seeds. Information about morphology, differences from closely related species, phenology, conservation status, and etymology are provided.

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Vascular epiphytes of the Atlantic Forest in the Sinos River basin, state of Rio Grande do Sul, Brazil: richness, floristic composition and community structure

Brazilian Journal of Biology ◽

10.1590/1519-6984.0913 ◽

2015 ◽

Vol 75 (2 suppl) ◽

pp. 25-35 ◽

Cited By ~ 6

Author(s):

MD Barbosa ◽

DFP Becker ◽

S Cunha ◽

A Droste ◽

JL Schmitt

Keyword(s):

Community Structure ◽

River Basin ◽

Atlantic Forest ◽

Floristic Composition ◽

Rio Grande ◽

Shannon Index ◽

Rio Grande Do Sul ◽

Importance Value ◽

Ecological Zones ◽

Vascular Epiphytes

<p>The Atlantic Forest, which has a vast epiphytic richness, is a priority area for preservation, listed as one of the five most important world hotspots. Vascular epiphyte richness, composition and community structure were studied in two fragments, one of the ombrophilous (29º43'42"S and 50º22'00"W) and the other of the seasonal (29º40'54"S and 51º06'56"W) forest, both belonging to the Atlantic Forest biome in the Sinos River basin, Rio Grande do Sul, Brazil. In each fragment, 40 trees, divided into four ecological zones, were analyzed. In each zone, the occurrence of the species was recorded, and the importance value of each species was calculated according to the frequency of phorophytes and intervals, and cover scores. The Shannon index was calculated for the two communities. In the fragment of the ombrophilous forest (F1), 30 epiphytic species were recorded, and in the seasonal forest (F2), 25. The highest importance value was found for <italic>Microgramma squamulosa</italic> (Kaulf.) de la Sota in both fragments. The diversity indexes for F1 (H'=2.72) and F2 (H'=2.55) were similar and reflected the subtropical location of the areas. The decrease in mean richness in both fragments in zone 3 (internal crown) to zone 4 (external crown) may be associated with time and space availability for epiphyte occupation and microclimate variations. Exclusive species were found in the areas, which suggest that a greater number of preserved fragments may result in a greater number of preserved epiphytic species in the Sinos River basin.</p>

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Testing capturing methods for the Yellow-legged Tinamou Crypturellus noctivagus (Wied, 1820) (Aves, Tinamidae) in southern Brazil

Papéis Avulsos de Zoologia ◽

10.11606/1807-0205/2018.58.07 ◽

2018 ◽

Vol 58 ◽

pp. 7

Author(s):

Luiz Liberato Costa Corrêa ◽

Maria Virginia Petry

Keyword(s):

Forest Floor ◽

Scientific Literature ◽

Rio Grande ◽

Sampling Effort ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Forest Bird ◽

Forest Remnant

Specific and efficient methods for capturing tinamous are scarce in the scientific literature. Here we tested the effectivity of two methods for capturing the Yellow-legged Tinamou Crypturellus noctivagus (Tinamidae): a bell-trap adapted with a nylon cast net and a type of fall-trap. In a forest remnant in Rio Grande do Sul state, Brazil, we applied 120 hours of sampling effort using the traps, resulting in the capture of six individuals (two females and four males). These capture methods are an efficient tools and useful for forest tinamous studies, although it can be also used for capturing other forest bird which use the forest floor.

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Spatial Analysis of Forest Fragmentation in the Atlantic Forest Bioma Areas

Journal of Agricultural Science ◽

10.5539/jas.v10n12p294 ◽

2018 ◽

Vol 10 (12) ◽

pp. 294

Author(s):

Juliana Marchesan ◽

Rudiney Soares Pereira ◽

Elisiane Alba ◽

Letícia Daiane Pedrali

Keyword(s):

Spatial Analysis ◽

Forest Fragmentation ◽

Atlantic Forest ◽

Matrix Effects ◽

Rio Grande ◽

Area Ratio ◽

Native Forest ◽

Forest Fragments ◽

Rio Grande Do Sul ◽

R Language

The goal of this work was to calculate landscape ecology metrics using the R language, allowing the analysis of forest fragments under the Atlantic Forest domain located in the sub-basin of Arroio Jaquirana, Rio Grande do Sul, Brazil. For the mapping of the forest fragments, we used images from the REIS/RapidEye sensor dated 2016, and the classification was supervised through the Bhattacharya algorithm. The fragments were analyzed in seven size classes, to separate them and to calculate the landscape metrics it was used R language. The results attained demonstrated that the native forest occupied 34.01% of the study area, covering a total of 1,995 fragments, of which 93.43% were less than 5 ha. The highest values of edge and perimeter-area ratio were found in the small fragments indicating a greater edge effect, with the central areas of these remnants being exposed to the external matrix effects. Thus, it is concluded that the Atlantic Forest is highly fragmented and is extremely important to establish measures to minimize the effects and/or increase the connectivity between the fragments through ecological corridors using the smaller fragments, in addition, it makes necessary the development of public policies and research for the management of the region in order to preserve the remnants.

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Cacti of Santa Maria – RS, Brazil

Ciência e Natura ◽

10.5902/2179460x39827 ◽

2021 ◽

Vol 43 ◽

pp. e23

Author(s):

Igor Wassiljew Moia ◽

Guilherme Moreira da Silva ◽

Liliana Essi

Keyword(s):

Endangered Species ◽

Central Region ◽

Threatened Species ◽

Conservation Status ◽

Rio Grande ◽

Complete List ◽

Rio Grande Do Sul ◽

Species List ◽

Floristic Survey ◽

Santa Maria

A floristic survey of the Cactaceae family was carried out in the municipality of Santa Maria, Brazil, which is localized in the central region of Rio Grande do Sul state. The study was conducted between August 2017 and November 2018, during which time 14 species were recorded. Five species are on the endangered species list of Rio Grande do Sul. The threatened species are Echinopsis oxygona (Link) Zucc. Ex. Pfeiff. Otto, Parodia horstii (F. Ritter) N.P. Taylor, Parodia glaucina (F. Ritter), Hofacker M. Machado, Parodia linkii (Lehm.), R. Kiesling, and Parodia ottonis (Lehm.) N. P. Taylor. This paper presents a complete list of the species with reference to conservation status.

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O Gênero Stylatractus Haeckel, 1887 (Radiolaria) em Sedimentos do Pleistoceno Superior - Holoceno da Margem Continental do Rio Grande do Sul

Pesquisas em Geociências ◽

10.22456/1807-9806.20301 ◽

2001 ◽

Vol 28 (2) ◽

pp. 263

Author(s):

SIMONE BAECKER FAUTH ◽

VALESCA BRASIL LEMOS

Keyword(s):

Detailed Analysis ◽

Continental Margin ◽

Species Distribution ◽

Rio Grande ◽

Growth Patterns ◽

Rio Grande Do Sul ◽

Upper Pleistocene ◽

Holocene Sediments ◽

First Occurrence

The genus Stylatractus Haeckel, 1887 (Radiolaria, Actinommidae) is abundant in upper Pleistocene – Holocene sediments form the Rio Grande do Sul continental margin. Some species of this genus are important Cenozoic biostratigraphic tools. A detailed analysis of the species distribution in Core T18 (GEOMAR VII), as well as an estimate of the chronology of these sediments was done. A revision of Stylatractus is proposed, based on the growth patterns of the Actinommidae skeletons. Three species of Stylatratus were identified in the studied material: Stylatractus neptunus Haeckel, emend., Stylatractus pluto Haeckel n. comb. and Stylatractus nerinus n.sp. The occurrence of Stylatractus nerinus n.sp. suggests that these sediments were deposited in the upper Pleistocene. The Pleistocene-Holocene transition is established by the first occurrence of Stylatractus pluto Haeckel n. comb. The results obtained from Core T18 can be extended to other cores from the Rio Grande do Sul continental margin where the genus was reported.

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Medium and large sized mammals of a semideciduous forest remnant in southern Brazil

Biota Neotropica ◽

10.1590/s1676-06032012000300023 ◽

2012 ◽

Vol 12 (3) ◽

pp. 239-245 ◽

Cited By ~ 2

Author(s):

Daniel Paulo de Souza Pires ◽

Cristina Vargas Cademartori

Keyword(s):

Rio Grande ◽

Trophic Group ◽

Metropolitan Region ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Mammalian Fauna ◽

Porto Alegre ◽

Semideciduous Forest ◽

Plot Analysis ◽

Forest Remnant

Knowledge about mammals of the Atlantic Forest is still lacking, especially because some places remain poorly studied or inventoried, which makes conservation initiatives difficult. We aimed to determine the species richness and composition of medium and large sized mammals in a semideciduous forest remnant, Morro do Coco, thus contributing information about the occurrence of mammalian fauna in the metropolitan region of Porto Alegre, southern Brazil. The methods consisted of interviews with local inhabitants, visual records and sand plot analysis. The study took place from July 2008 to April 2009, with monthly expeditions of three days. Sixteen species of mammals were recorded, seven of which are threatened with extinction in Rio Grande do Sul and one nationally. The predominant trophic group was the frugivorous/herbivorous. The study area is situated in a prioritized zone for the conservation of mammals in Greater Porto Alegre, since it consists of one of the last remnants where the phytophysionomies that originally occupied the edge of Guaiba Lake and granite hills of the region are represented and preserved.

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The benthic macroinvertebrate fauna of highland streams in southern Brazil: composition, diversity and structure

Revista Brasileira de Zoologia ◽

10.1590/s0101-81752007000200005 ◽

2007 ◽

Vol 24 (2) ◽

pp. 294-301 ◽

Cited By ~ 22

Author(s):

Ludwig Buckup ◽

Alessandra A. P. Bueno ◽

Georgina Bond-Buckup ◽

Marcelo Casagrande ◽

Fabiane Majolo

Keyword(s):

Community Structure ◽

Rio Grande ◽

Diversity Indices ◽

Benthic Macroinvertebrate ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Two Samples ◽

Highland Streams ◽

Macroinvertebrate Fauna

Benthic macroinvertebrate in four rivers, three in the Pelotas River basin (Divisa, Marco and Silveira rivers, in the headwaters of the Uruguai River) and one in the Taquari-Antas system (Antas River), a tributary in the Guaíba basin, in the state of Rio Grande do Sul, were identified. Two samples were collected in summer, autumn and spring, with one replicate in each river. The total of 28,961 specimens included members of Platyhelminthes, Annelida, Acarina, Insecta, Crustacea and Mollusca. The Silveira and Marco rivers showed significant differences in the indices of Shannon-Weaver (H’), Simpson’s Reciprocal (1/D), Margalef (DMg) and Equitability (E). The Silveira River showed the highest means of diversity and the EPT index (Ephemeroptera, Plecoptera, Trichoptera). Comparison among the diversity indices, considered individually, were insufficient to show differences in community structure, for the purpose of ecological characterization of the rivers. The EPT values characterized the Divisa River as having the highest abundance (73%), followed by the Marco (71%), Antas (48%) and Silveira (36%). These results suggest that the Silveira River is subject to moderate environmental stress, from human impact, although it showed the highest diversity of the major macrobenthic groups.

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Two new records of endemic and endangered angiosperms in Santa Catarina, Brazil

Check List ◽

10.15560/11.6.1812 ◽

2015 ◽

Vol 11 (6) ◽

pp. 1812

Author(s):

Cleusa Vogel Ely ◽

Ilsi Iob Boldrini

Keyword(s):

Endangered Species ◽

Geographic Distribution ◽

New Records ◽

Rio Grande ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Knowledge Gaps ◽

Santa Catarina ◽

The North ◽

New Occurrences

The two endemic, endangered species, Baccharis hypericifolia (Asteraceae) and Hypericum salvadorense (Hypericaceae), were known only for the Rio Grande do Sul state, in Brazil. In this paper we report two new occurrences of these species in Santa Catarina, expanding their geographic distribution to the north. Baccharis hypericyfolia and H. salvadorense were collected in areas of PPBio (Programa de Pesquisa em Biodiversidade) project. These novelties evidence the presence of knowledge gaps regarding the flora and little collecting effort in the grasslands from Southern Brazil.

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