scholarly journals Arachnids from Araripe Plateau, Ceará, Brazil

Check List ◽  
2016 ◽  
Vol 12 (4) ◽  
pp. 1920 ◽  
Author(s):  
Raul Azevedo ◽  
Eridiane Da S. Moura ◽  
Adreany S. Lopes ◽  
Leonardo S. Carvalho ◽  
Sidclay C. Dias ◽  
...  
Keyword(s):  
Species Richness ◽  
Deciduous Forest ◽  
High Elevation ◽  
Northeastern Brazil ◽  
Semiarid Region ◽  
High Humidity ◽  
Species List ◽  
Orographic Rainfall ◽  
Caatinga Biome

The Araripe Plateau is situated in the states of Ceará, Piauí and Pernambuco, northeastern Brazil, in the Caatinga biome, semiarid domain. This region of Brazil is characterized by high temperatures and low rainfall. Nevertheless, due to its high elevation and large amount of orographic rainfall, the Araripe Plateau is an exception as a seasonal semi-deciduous forest with high humidity in the semiarid domain and the Caatinga biome. Herein a species list of Araripe Plateau arachnids is presented from the compilation of data from in situ sampling from January to May 2013, from the literature, and from Brazilian arachnid collections data. A total of 68 species were recorded for the area, of which 53 were spiders, eight harvestmen and seven scorpions. The species richness recorded here is considered significant regarding the known diversity of Arachnida in the semiarid region and contributes to expanding our knowledge of the area.

scholarly journals The effects of rainfall and vegetation on litterfall production in the semiarid region of northeastern Brazil

2015 ◽  
Vol 75 (3) ◽  
pp. 703-708 ◽  
Author(s):  
MCA Lopes ◽  
VFP Araújo ◽  
A Vasconcellos
Keyword(s):  
Species Richness ◽  
Accumulation Rate ◽  
Northeastern Brazil ◽  
Anthropogenic Factors ◽  
Semiarid Region ◽  
Time Interval ◽  
Seasonally Dry ◽  
Nylon Mesh ◽  
Litterfall Production ◽  
Dry Tropical Forests

AbstractLitterfall has a strong influence on biodiversity and on the chemical and physical characteristics of the soil. Its production can be quite variable over time and space, and can be influenced by both natural and anthropogenic factors. We evaluated litterfall production and its relationship with rainfall, species richness, and the densities of the arboreal vegetation. Thirty litter traps were constructed with 1.0 m2 nylon mesh (1.0 mm) and randomly installed within a 2000 m × 500 m area of arboreal/shrub Caatinga (dryland) vegetation. Litter samples were collected monthly from November/2010 to June/2012, and the collected material was classified, dried, and weighted. Species richness and tree densities were determined by conducting phytosociological surveys in 20 m × 20 m plots surrounding each of the litter traps. The litterfall accumulation rate was 3.673 Mgha–1yr–1, similar to values from other seasonally dry tropical forests. Litterfall production was continuous, and principally accompanied the rainfall rate, but with a time interval of 2 to 3 months, with the greatest accumulation at the beginning of the dry season and the least during the rainy season. The different fractions of materials demonstrated distinct accumulation rates, with leaves being the principal category. Litterfall production was found to be related to tree density, but no link was found to species richness. The observed temporal heterogeneity of litterfall production demonstrated a strong link between rainfall and the dynamics of nutrient cycling in the semiarid region of Brazil.

scholarly journals Floristics and life-forms along a topographic gradient, central-western Ceará, Brazil

Rodriguésia ◽  
2011 ◽  
Vol 62 (2) ◽  
pp. 341-366 ◽  
Author(s):  
Francisca Soares de Araújo ◽  
Rafael Carvalho da Costa ◽  
Jacira Rabelo Lima ◽  
Sandra Freitas de Vasconcelos ◽  
Luciana Coe Girão ◽  
...  
Keyword(s):  
Species Richness ◽  
Deciduous Forest ◽  
Woody Species ◽  
Life Forms ◽  
Northeastern Brazil ◽  
Topographic Gradient ◽  
Plant Life Forms ◽  
Species Overlap ◽  
Semi Arid Region ◽  
Biological Spectrum

Abstract To test whether the flora is organized in discrete or continuous units along a topographic gradient, three physiognomies were assessed on different soil classes in a semi-arid region of northeastern Brazil: caatinga (xeric shrubland) at altitudes from 300 to 500 m, deciduous forest at altitudes from 500 to 700 m and carrasco (deciduous shrubland) at 700 m. In each physiognomy a species inventory was carried out, and plants were classified according to life- and growth-forms. Species richness was higher in the deciduous forest (250) than in the carrasco (136) and caatinga (137). The caatinga shared only a few species with the carrasco (6 species) and the deciduous forest (18 species). The highest species overlap was between the deciduous forest and the carrasco (62 species). One hundred and four species occurred only in the caatinga, 161 only in the deciduous forest and 59 only in the carrasco. Woody species predominated in physiognomies on sedimentary soils with latosol and arenosol: 124 species occurred in the deciduous forest and 68 in the carrasco. In the caatinga on crystalline basement relief with predominance of planosol, herbs showed the highest species richness (69). Comparing the biological spectrum of Brazilian plant life-forms, the caatinga stood out with higher proportion of therophytes and chamaephytes. Considering the flora of the three phytophysiognomies studied here, we can affirm that the caatinga is a discrete floristic unit.

A new species of Centris (Paracentris) Cameron, 1903 from northeastern Brazil, with a key for the Centris species of the Caatinga region (Hymenoptera: Apidae)

Zootaxa ◽  
2012 ◽  
Vol 3298 (1) ◽  
pp. 1 ◽  
Author(s):  
FELIPE VIVALLO ◽  
FERNANDO CÉSAR VIEIRA ZANELLA
Keyword(s):  
Species Richness ◽  
New Species ◽  
Northeastern Brazil ◽  
Semiarid Region ◽  
The Andes ◽  
Brazilian Species ◽  
Close Relationship ◽  
First Time ◽  
A New Species

Centris (Paracentris) Cameron is one of the subgenera with the greatest species richness of the bee tribe Centridini. Inthis paper, Centris nordestina, a new Brazilian species of the subgenus is described, and due to its close relationship witha clade of Andean species, a new biogeographical track is defined uniting northeastern Brazil with the Andes. For the first time a key for the species of the Caatinga region, the semiarid region of northeastern Brazil, is provided.

scholarly journals Angiosperms from the Araripe National Forest, Ceará, Brazil

Check List ◽  
2012 ◽  
Vol 8 (4) ◽  
pp. 744 ◽  
Author(s):  
Suelma Ribeiro-Silva ◽  
Marcelo Brilhante de Medeiros ◽  
Beatriz Machado Gomes ◽  
Emídia Naiana Costa Seixas ◽  
Maria Arlene Pessoa Da Silva
Keyword(s):  
Forest Products ◽  
Sensu Stricto ◽  
Local Communities ◽  
Northeastern Brazil ◽  
National Forest ◽  
Species List ◽  
Floristic Survey ◽  
Caatinga Biome ◽  
Non Timber Forest Products ◽  
Seasonal Forests

This study provides a species list of the angiosperms from the Araripe National Forest (ANF) in the south part of Ceará state, northeastern Brazil. The floristic survey recorded 188 species from 55 Angiosperm families. The most species-rich families were Fabaceae (31), Rubiaceae (17), Asteraceae (14), Bignoniaceae (10), Myrtaceae (9), Euphorbiaceae (7), Apocynaceae and Malpighiaceae (7) and Annonaceae and Solanaceae (5). The flora of the ANF is composed of typical species from the vegetation physiognomies of Cerrado sensu lato such as cerradão and cerrado sensu stricto and it is influenced by the northeastern phytogeographic Cerrado province. Furthermore, there are influences of ecotones between these physiognomies, seasonal forests and carrascos within the Caatinga biome. In addition to four threatened species that were recorded, the ANF also harbors species that represent important incomes for local communities because of the non-timber forest products, such as Dimorphandra gardneriana Tul. and Caryocar coriaceum Wittm.

The spongillafly genus Sisyra Burmeister, 1839 (Neuroptera: Sisyridae) from Brazil: Distributional, taxonomical and bionomical notes

Zootaxa ◽  
2020 ◽  
Vol 4802 (2) ◽  
pp. 374-382
Author(s):  
ALICE CARVALHO ASSMAR ◽  
ADOLFO RICARDO CALOR
Keyword(s):  
Aquatic Insects ◽  
Male Genitalia ◽  
Northeastern Brazil ◽  
Semiarid Region ◽  
Small Family ◽  
Extant Species ◽  
The Family ◽  
Caatinga Biome ◽  
New Synonymy ◽  
First Time

Sisyridae is a small family of aquatic insects, with 73 extant species described worldwide. In Brazil, 17 species of two genera, Climacia McLachlan, 1869 and Sisyra Burmeister, 1839, have been reported. In this paper, the family is recorded from the Caatinga biome (semiarid region), Northeastern Brazil, for the first time, including a record of the genus Sisyra from Ceará State. Additional distributional data are presented for both S. apicalis Banks, 1908 and S. panama Parfin & Gurney, 1956. Sisyra ariasi Penny, 1981 is here synonymized with S. panama, NEW SYNONYMY. Illustrations of the male genitalia of S. minuta Esben-Petersen, 1935, and bionomic notes for S. panama are provided. 

scholarly journals Birds of the Grota do Angico Natural Monument in the semi-arid Caatinga scrublands of northeastern Brazil

2011 ◽  
Vol 11 (2) ◽  
pp. 269-276 ◽  
Author(s):  
Juan Ruiz-Esparza ◽  
Sidney Feitosa Gouveia ◽  
Patricio Adriano da Rocha ◽  
Raone Beltrão-Mendes ◽  
Adauto de Souza Ribeiro ◽  
...  
Keyword(s):  
Species Richness ◽  
Northeastern Brazil ◽  
Caatinga Biome ◽  
Natural Monument ◽  
Limited Scope ◽  
Semi Arid

An inventory of the avian fauna of the Grota do Angico Natural Monument in the Caatinga of northern Sergipe, Brazil, revealed the presence of at least 140 species, including nine that are endemic to the Caatinga and seasonal forest adjacent. Despite the limited scope of the study (two expeditions in July and August, 2008), the species richness recorded at the site appeared to be typical of the region and the Caatinga biome.

Assemblage Patterns of Hymenoptera at Different Elevations of Gunung Datuk, Rembau

2017 ◽  
Vol 14 (2) ◽  
pp. 1 ◽  
Author(s):  
Noor Nasuha Abd Aziz ◽  
Siti Khairiyah Mohd Hatta ◽  
Idris Abd Ghani ◽  
Saiyid Jalaluddin Saiyid Shaifuddin
Keyword(s):  
Species Richness ◽  
Diversity Index ◽  
High Elevation ◽  
Significant Difference ◽  
Index Site ◽  
Evenness Index ◽  
Abundance And Diversity ◽  
Richness Index ◽  
Paired T Test ◽  
Malaise Traps

A study on abundance and diversity of Hymenoptera was conducted in Gunung Datuk, Rembau. Samplings were conducted from November 2014 to February 2015 using six Malaise traps. Three traps were placed at Site 1 at 700m height for high elevation and the remaining traps were placed at Site 2 at 200m height for low elevation. A total number of 221 Hymenopteran were collected which consist of nine families namely Ichneumonidae, Formicidae, Braconidae, Bethylidae, Evaniidae, Tiphiidae, Vespidae, Pompilidae and Apidae. In this study, 93 individuals were obtained from Site 1, comprising nine families and 43 morphospecies while 127 individuals were obtained from Site 2 with nine families and 45 morphospecies. Formicidae was the most dominant family collected from both sites with a total of 104 individuals while the least family recorded was Apidae with only one individual. Shannon’s Weiner Diversity Index (H’) showed Site 1 had the higher diversity value with H’ = 3.17 compared to Site 2 with value H’ = 3.12. For Evenness Index, Site 1 had higher value compared to Site 2 with E’ = 0.84 and E’ = 0.82 respectively. Moreover, for Margalef Richness Index, Site 1 recorded R’ = 9.24 while site two recorded R’ = 9.08 which concluded that Site 1 had higher species richness compared to Site 2. Paired t-test showed that both sites had no significant difference with p>0.05. Overall study showed that the diversity and abundance of Hymenoptera in Gunung Datuk were low since the value of H’ is less than 3.50.

scholarly journals Salinity and freshwater discharge determine rotifer distribution at the Mossoró River Estuary (Semiarid Region of Brazil)

2010 ◽  
Vol 70 (3) ◽  
pp. 551-557 ◽  
Author(s):  
AMA. Medeiros ◽  
JEL. Barbosa ◽  
PR. Medeiros ◽  
RM. Rocha ◽  
LF. Silva
Keyword(s):  
Species Richness ◽  
Rainy Season ◽  
Salinity Gradient ◽  
River Estuary ◽  
Positive Influence ◽  
Freshwater Discharge ◽  
The Other ◽  
Semiarid Region ◽  
Inverse Estuary ◽  
Species Richness And Abundance

The present study aimed at evaluating differences in rotifer distribution in three estuarine zones in an inverse estuary located in the Semiarid Region of Brazil. Zones were chosen based on their proximity to the ocean and river border as a means of reflecting a horizontal salinity gradient. High freshwater discharge during the rainy season was the major determinant of rotifer composition. On the other hand, due to higher salinity values during the dry season, very low values of species richness and abundance were observed in all zones. Therefore, the study highlights the constraints of salinity and the positive influence of seasonality and river proximity on rotifer species in a semiarid estuarine environment.

scholarly journals Assessment of MERRA-2 and ERA5 to Model the Snow Water Equivalent in the High Atlas (1981–2019)

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 890
Author(s):  
Mohamed Wassim Baba ◽  
Abdelghani Boudhar ◽  
Simon Gascoin ◽  
Lahoucine Hanich ◽  
Ahmed Marchane ◽  
...  
Keyword(s):  
River Discharge ◽  
Snow Water Equivalent ◽  
High Elevation ◽  
Water Runoff ◽  
High Atlas ◽  
Seasonal Snow ◽  
Snow Covered Area ◽  
Covered Area ◽  
Snow Water

Melt water runoff from seasonal snow in the High Atlas range is an essential water resource in Morocco. However, there are only few meteorological stations in the high elevation areas and therefore it is challenging to estimate the distribution of snow water equivalent (SWE) based only on in situ measurements. In this work we assessed the performance of ERA5 and MERRA-2 climate reanalysis to compute the spatial distribution of SWE in the High Atlas. We forced a distributed snowpack evolution model (SnowModel) with downscaled ERA5 and MERRA-2 data at 200 m spatial resolution. The model was run over the period 1981 to 2019 (37 water years). Model outputs were assessed using observations of river discharge, snow height and MODIS snow-covered area. The results show a good performance for both MERRA-2 and ERA5 in terms of reproducing the snowpack state for the majority of water years, with a lower bias using ERA5 forcing.

scholarly journals Plant breeding in the semiarid region of Brazil: examples of success

2012 ◽  
Vol 12 (spe) ◽  
pp. 57-66 ◽  
Author(s):  
Manoel Abílio de Queiroz ◽  
Levi de Moura Barros ◽  
Luiz Paulo de Carvalho ◽  
Jonas de Araújo Candeia ◽  
Edinardo Ferraz
Keyword(s):  
Cotton Fiber ◽  
Production Systems ◽  
Rio Grande ◽  
Semiarid Region ◽  
Breeding Programs ◽  
Caatinga Biome ◽  
Colored Cotton ◽  
Nut Production ◽  
Production Area ◽  
Naturally Colored Cotton

The Northeastern region of Brazil comprises the Caatinga biome (900,000 km²) part of which is a semiarid region with rainfed and irrigated production systems. Among the successful breeding programs are cashew and cotton. The first led to a substantial increase in nut production in Ceará, Rio Grande do Norte and Piauí and the second bred a naturally colored cotton fiber, now processed in small clothing industries in Paraiba, exporting to 11 countries. In the lower-middle São Francisco valley, the previously grown onion was replaced by improved varieties, on 90% of the production area, and by industrial tomato, introduced by research in 1972, which came to be used on more than 80% of the area at the time. The participation of the private sector and continuity of breeding programs were crucial for the success. More examples of success are expected with the establishment of postgraduate courses in Agricultural Sciences in the Semiarid region.

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