scholarly journals Reptilia, Squamata, Amphisbaenidae, Amphisbaena cegei Montero, 1997, and Reptilia, Squamata, Teiidae, Tupinambis rufescens (Günther, 1871): Vertical range extension

Check List ◽  
2010 ◽  
Vol 6 (4) ◽  
pp. 503
Author(s):  
Martin Jansen ◽  
Gunther Köhler
Keyword(s):  
Vertical Distribution ◽  
Dry Forest ◽  
Range Extension ◽  
Vertical Range

We report on records of Amphisbaena cegei and Tupinambis rufescens in the Bolivian Inter-Andean Dry Forest (Bolivia) that extend the known vertical distribution.

scholarly journals Nesting Substrate Characteristics of Partamona seridoensis Pedro & Camargo (Hymenoptera: Apidae) in Areas of Dry Forest in Brazil

Sociobiology ◽  
2017 ◽  
Vol 64 (1) ◽  
pp. 26 ◽  
Author(s):  
Carlo Rivero Moura Fernandes ◽  
Alerson Brito Almeida ◽  
Marco Antonio Del Lama ◽  
Celso F Martins
Keyword(s):  
Vertical Distribution ◽  
Dry Forest ◽  
Northeastern Brazil ◽  
Nest Entrance ◽  
Parental Relationship ◽  
Nesting Substrate ◽  
First Time ◽  
Bee Colonies ◽  
The Vertical Distribution

For the first time the association between Partamona seridoensis and Constrictotermes cyphergaster is described. Partamona seridoensis occurs in xeric areas of Northeastern Brazil, and it is a termitophile species as its nests are built in active and inactive arboreal termite nests of the species C. cyphergaster. This study aimed to verify the characteristics of the nesting substrate used by P. seridoensis in two areas of dry forest (caatinga) in Cariri region, Paraíba state. It has been found that the vertical distribution of termites that contained colonies of P. seridoensis varied from 10 cm to 3.60 m, while the height of the nest entrance varied from 20 cm to 3.70 m. Commiphora leptophloeos, popularly known as imburana, was the support tree of 22 (43.1%) from 51 observed termite nests that harbored bee colonies. Most (44; 86.2%) of the host termites colonies were active. Most of the colonies showed the nest entrances not directed to the east/southeast. All colonies located were housed in large termite nests, whose volumes exceed 30 liters. In the two areas surveyed, frequently the entrances of the nests were directed to other nearby colonies, suggesting a parental relationship that should be further investigated.

A Hydroacoustic Study of the Pelagic Spawning Behavior of Whitefish (Coregonus lavaretus) in Lake Constance

1991 ◽  
Vol 48 (6) ◽  
pp. 995-1002 ◽  
Author(s):  
Reiner Eckmann
Keyword(s):  
Vertical Distribution ◽  
Distribution Patterns ◽  
Target Strength ◽  
Coregonus Lavaretus ◽  
Upward Migration ◽  
Vertical Range ◽  
Abundance Estimates ◽  
Lake Bottom ◽  
Total Fish ◽  
Pelagic Spawning

The horizontal and vertical distribution patterns of pelagic spawning whitefish (Coregonus lavaretus) were studied by echosounding from the end of the growing season (early November) until after spawning (late January). During early November, whitefish inhabited similar depths during day and night, but during spawning displayed vertical migrations of up to 50 m amplitude: whitefish ascended at dusk and descended at dawn. At the end of the spawning season, vertical migrations ceased. Juveniles took part in the daily migrations, but only sexually mature specimens invaded the uppermost 10 m of water, while maturing and juvenile individuals and spent females stayed deeper during the night. This vertical distribution pattern is interpreted as a means to increase encounter probability among mature specimens. Diel vertical migration of the entire population is suggested to be an aid to avoid cannibalism on freshly spawned eggs during settling to the lake bottom. Total fish density estimates increased during upward migration and decreased during downward migration; this may be the result of differences in target strength caused by both reduced swimbladder volume and positive tilt while in deep waters. Highly reproducible abundance estimates were obtained during night when whitefish were evenly distributed at the top of their vertical range.

Young squid in the plankton of Prydz Bay, Antarctica

1994 ◽  
Vol 6 (2) ◽  
pp. 171-173 ◽  
Author(s):  
J.A. Filippova ◽  
E.A. Pakhomov
Keyword(s):  
Vertical Distribution ◽  
Deep Water ◽  
Abundant Species ◽  
Prydz Bay ◽  
Midwater Trawl ◽  
Circumpolar Deep Water ◽  
Vertical Range ◽  
The Antarctic

A collection of juvenile squid were caught with the Isaacs-Kidd midwater trawl (IKMT) and the Juday plankton net at 86 stations in Prydz Bay (60°–67°30′S, 60°–80°E) to a depth of 500 m but mostly at 0–200 m. Five species were identified, Psychroteuthis glacialis, Alluroteuthis antarcticus, Brachioteuthis sp. and the cranchiids Galiteuthis glacialis and Mesonychoteuthis hamiltoni. P. glacialis and the cranchiids were the most abundant species. Young P. glacialis (5–17 mm ML) were taken at depths of 5–200 m but concentrated in the upper 100 m whilst the cranchiids (5–35 mm ML) occurred over a wider vertical range (50–500 m). The regular occurrence of paralarvae and juveniles suggests that all the species reproduce in the Antarctic. Juvenile Vertical distribution appears to differ between species with P. glacialis concentrated relatively near the surface, the cranchiids in the upper part of the Circumpolar Deep Water and A. antarcticus widely distributed to a depth of 900 m.

scholarly journals Vertical distribution, nutrient concentration and seasonal changes of fine root mass in a semi-deciduous tropical dry forest and in two adjacent pastures in the Western Llanos of Venezuela

2020 ◽  
Vol 8 (2) ◽  
pp. 93-104
Author(s):  
Ana Francisca González-Pedraza ◽  
Nelda Dezzeo
Keyword(s):  
Vertical Distribution ◽  
Seasonal Changes ◽  
Rainy Season ◽  
Nutrient Concentration ◽  
Fine Root ◽  
Tropical Dry Forest ◽  
Dry Season ◽  
Dry Forest ◽  
Nutrient Concentrations ◽  
Root Mass

With the objective to contribute to a better understanding of ecological consequences of deforestation on the below-ground system in the Western Llanos of Venezuela, we evaluated the vertical distribution, nutrient concentration and seasonal changes of total fine root mass (FRM) (<2 mm diameter) in a semi-deciduous tropical dry forest and in 2 adjacent pastures of Cynodon nlemfuensis: a young pasture (YP, 5 years old) and an old pasture (OP, 18 years old) in the Obispo municipality, Barinas State. This evaluation included measurements at the end of the rainy season, during the dry season and during the subsequent early rainy season in 2005/2006. Highest FRM was recorded during the dry season, which probably indicates a plant water-stress response mechanism. The highest proportion (63‒88%) of FRM was concentrated in the 10–20 cm soil layer at all studied sites, probably due to a higher nutrient and moisture content at that depth. Non-significant differences (P>0.05) were observed in the total concentrations of organic carbon, nitrogen, phosphorus, calcium and magnesium in the FRM in soils supporting forest, OP and YP at the evaluated depths. Non-significant changes in the total FRM and nutrient concentrations were observed between the sampling periods and the 3 study sites. YP soils showed a slight increase in FRM that could be associated with the root growth of secondary vegetation, which is considered a weed and is periodically removed. Our results suggest that the land use change from tropical forest to pastures has not significantly affected the mass of fine roots and their carbon and nutrient concentrations. Further studies are needed to determine if these findings apply to other ecosystems.

scholarly journals Recovery of rocky intertidal zonation: two years after the 2011 Great East Japan Earthquake

2015 ◽  
Vol 96 (8) ◽  
pp. 1549-1555 ◽  
Author(s):  
Takashi Noda ◽  
Aiko Iwasaki ◽  
Keiichi Fukaya
Keyword(s):  
Vertical Distribution ◽  
Species Abundance ◽  
Great East Japan Earthquake ◽  
Rocky Intertidal ◽  
Mobile Species ◽  
Intertidal Zonation ◽  
Vertical Range ◽  
Vertical Distributions ◽  
The Vertical Distribution ◽  
Clear Change

To assess the course and status of recovery of rocky intertidal zonation after massive subsidence caused by the 2011 Great East Japan Earthquake, from 2011 to 2013 we censused the vertical distribution of 10 dominant macrobenthic species (six sessile and four mobile species) in the mid-shore zone of 23 sites along the Sanriku coastline, 150–160 km north-northwest of the earthquake epicentre, and compared the vertical distributions of each species with their vertical distributions in the pre-earthquake period. The dynamics of rocky intertidal zonation varied substantially among species. Among sessile species, one barnacle dramatically increased in abundance and expanded its vertical range in 2011, but then decreased and completely disappeared from all plots by 2013. Zonations of other sessile species shifted downward following the subsidence in 2011. With some species, there was no clear change in abundance immediately after the earthquake, but they then began to increase and move upward after a few years; with other species, abundance continuously decreased. There was no clear change in the vertical distribution of any of the mobile species immediately after the earthquake. Abundance of two mobile species was unchanged, but abundance of the others decreased from 2012 and had not recovered as of 2013.

The distribution of Decapoda (Crustacea) in the open ocean and near-bottom over an adjacent slope in the northern North-east Atlantic Ocean during autumn 1979

1984 ◽  
Vol 64 (4) ◽  
pp. 829-857 ◽  
Author(s):  
P. M. Hargreaves
Keyword(s):  
Vertical Distribution ◽  
Continental Slope ◽  
Deep Water ◽  
Principal Factor ◽  
East Atlantic ◽  
Sea Floor ◽  
North East ◽  
Vertical Range ◽  
Rockall Trough ◽  
The Vertical Distribution

The vertical distribution of Decapoda (Crustacea) at deep-water stations in the Rockall Trough and the Porcupine Seabight is discussed and compared to the near-bottom distribution of Decapoda on the continental slope of the Seabight. The vertical distribution of some species is unaffected by the shallowing of the sea floor in the slope area. Other species are found in much higher concentrations near-bottom over the slope than at similar depths at the adjacent deep-water stations and at least one species extends its lower vertical range. It is suggested that the increased food availability near-bottom may be the principal factor influencing aggregation.

Vertical distribution and daily patterns of birds in the dry deciduous forests of central western Madagascar

2020 ◽  
Vol 33 (1) ◽  
Author(s):  
Jeanne Arline Rajaonarivelo ◽  
Aristide Andrianarisima ◽  
Marie Jeanne Raherilalao ◽  
Steven Goodman
Keyword(s):  
Vertical Distribution ◽  
Vegetation Structure ◽  
Deciduous Forest ◽  
Bird Species ◽  
Vertical Gradient ◽  
Early Morning ◽  
Forest Birds ◽  
Dry Forest ◽  
Vertical Movements ◽  
Ecological Requirements

Data on the vertical distribution and ecological requirements of forest birds in western Madagascar are poorly documented. Strata use of forest-dwelling birds associated with vegetation structure and daily temperature patterns was examined in the dry deciduous forest of Kirindy. Six line transects of 1000 m each were used to survey birds and linear sampling to quantify vegetation structure. Data loggers were employed to record differences in temperature across vertical forest strata. A total of 3468 observations of 37 bird species were recorded. In the early morning, birds called frequently and used the canopy, at mid-day, when temperature in the upper strata increased on average around 7ºC, they tended to descend along a vertical gradient to the denser vegetation of the understory, presumably to avoid heat stress. In the case of largerbodied canopy birds, they occupied the mid-story during the heat of the day. Regardless of the time of the day, the mid-story was widely used by forest birds for feeding, roosting, and preening. These results demonstrate the sensitivity and vertical movements of birds to varying environmental conditions and provide new information on the ecology of Malagasy dry forest-dwelling birds.

scholarly journals New geographic and altitudinal range extension of the rare Pristimantis divnae Lehr & von May, 2009 (Anura: Craugastoridae) in Peru

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1728
Author(s):  
Juan Carlos Chaparro ◽  
F. Peter Condori ◽  
Luis Mamani ◽  
Jessica L. Deichmann
Keyword(s):  
Vertical Distribution ◽  
First Record ◽  
Range Extension ◽  
Geographical Range ◽  
Habitat Requirements ◽  
Southern Peru ◽  
Altitudinal Range ◽  
Madre De Dios ◽  
Lowland Forests

Pristimantis divnae is a nocturnal, semi-arboreal species found in lowland forests of southern Peru in the departments of Cusco, Madre de Dios and Puno. Here, we present a 382 km geographical range extension and the first record at 980 m elevation, increasing the known vertical distribution by 678 m. This is also the first record of this species from premontane forest, suggesting that habitat requirements of P. divnae are broader than originally anticipated.

Land Use Change and Commodity Frontiers

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Daniel M. Cáceres ◽  
Esteban Tapella ◽  
Diego A. Cabrol ◽  
Lucrecia Estigarribia
Keyword(s):  
Large Scale ◽  
Field Work ◽  
Dry Forest ◽  
Social Actors ◽  
Goods And Services ◽  
Fast Pace ◽  
Forest Use ◽  
The Government ◽  
Social Environmental ◽  
Management Recommendations

Argentina is experiencing an expansion of soya and maize cultivation that is pushing the agricultural frontier over areas formerly occupied by native Chaco forest. Subsistance farmers use this dry forest to raise goats and cattle and to obtain a broad range of goods and services. Thus, two very different and non-compatible land uses are in dispute. On the one hand subsistance farmers fostering an extensive and diversified forest use, on the other hand, large-scale producers who need to clear out the forest to sow annual crops in order to appropriate soil fertility. First, the paper looks at how these social actors perceive Chaco forest, what their interests are, and what kind of values they attach to it. Second, we analyze the social-environmental conflicts that arise among actors in order to appropriate forest’s benefits. Special attention is paid to the role played by the government in relation to: (a) how does it respond to the demands of the different sectors; and (b) how it deals with the management recommendations produced by scientists carrying out social and ecological research. To put these ideas at test we focus on a case study located in Western Córdoba (Argentina), where industrial agriculture is expanding at a fast pace, and where social actors’ interests are generating a series of disputes and conflicts. Drawing upon field work, the paper shows how power alliances between economic and political powers, use the institutional framework of the State in their own benefit, disregarding wider environmental and social costs. 

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