Patagonian Steppe
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Rain Shadows
WEB TUTORIAL 24.2 Rain Shadows Text Sections Section 24.4 Earth's Physical Environment, p. 428 Introduction Atmospheric circulation patterns strongly influence the Earth's climate. Although there are distinct global patterns, local variations can be explained by factors such as the presence of absence of mountain ranges. In this tutorial we will examine the effects on climate of a mountain range like the Andes of South America. Learning Objectives • Understand the effects that topography can have on climate. • Know what a rain shadow is. Narration Rain Shadows Why might the communities at a certain latitude in South America differ from those at a similar latitude in Africa? For example, how does the distribution of deserts on the western side of South America differ from the distribution seen in Africa? What might account for this difference? Unlike the deserts of Africa, the Atacama Desert in Chile is a result of topography. The Andes mountain chain extends the length of South America and has a pro- nounced influence on climate, disrupting the tidy latitudinal patterns that we see in Africa. Let's look at the effects on climate of a mountain range like the Andes. The prevailing winds—which, in the Andes, come from the southeast—reach the foot of the mountains carrying warm, moist air. As the air mass moves up the wind- ward side of the range, it expands because of the reduced pressure of the column of air above it. The rising air mass cools and can no longer hold as much water vapor. The water vapor condenses into clouds and results in precipitation in the form of rain and snow, which fall on the windward slope. -
First Record of Batrachochytrium Dendrobatidis in Pleurodema Somuncurense, a Critically Endangered Species from Argentina
CORE Metadata, citation and similar papers at core.ac.uk Provided by SEDICI68 - Repositorio AMPHIBIAN de la UNLP AND REPTILE DISEASES urbAn, M. c., L. A. Lewis, K. fučiKová, And A. cordone. 2015. Population WEBSTER, J., AND R. WEBER. 2007. Introduction to Fungi, 3rd Edition. of origin and environment interact to determine oomycete infec- Cambridge University Press, New York. 867 pp. tions in spotted salamander populations. Oikos 124:274–284. Herpetological Review, 2017, 48(1), 68–70. © 2017 by Society for the Study of Amphibians and Reptiles First Record of Batrachochytrium dendrobatidis in Pleurodema somuncurense, a Critically Endangered Species from Argentina The Valcheta Frog, Pleurodema somuncurense (Cei 1969), sterile fine-tipped rayon swabs with plastic shafts, on the ventral is an endemic species from the Somuncura Plateau (northern surface, hind limbs and interdigital membrane following the Patagonia, Argentina) with a high degree of habitat specialization techniques of Hyatt et al. (2007). and a very small distributional range. It is an almost wholly We also found two dead individuals at the eastern warm aquatic frog that inhabits permanent thermal springs and branch (Fig. 1). These individuals were fixed in formalin, and then the warm headwaters of the Valcheta Stream, a watercourse we took samples of shed skin from hind limbs. These samples located at the edge of the plateau. The Valcheta Frog is one of were observed with a light microscope at 400x magnification to most endangered species of Argentina (Vaira et al. 2012) and search for the characteristic Bd zoosporangia. one of the three amphibians in this country listed as Critically The swab samples were preserved in absolute ethanol. -
Northwest Argentina (Custom Tour) 13 – 24 November, 2015 Tour Leader: Andrés Vásquez Co-Guided by Sam Woods
Northwest Argentina (custom tour) 13 – 24 November, 2015 Tour leader: Andrés Vásquez Co-guided by Sam Woods Trip Report by Andrés Vásquez; most photos by Sam Woods, a few by Andrés V. Elegant Crested-Tinamou at Los Cardones NP near Cachi; photo by Sam Woods Introduction: Northwest Argentina is an incredible place and a wonderful birding destination. It is one of those locations you feel like you are crossing through Wonderland when you drive along some of the most beautiful landscapes in South America adorned by dramatic rock formations and deep-blue lakes. So you want to stop every few kilometers to take pictures and when you look at those shots in your camera you know it will never capture the incredible landscape and the breathtaking feeling that you had during that moment. Then you realize it will be impossible to explain to your relatives once at home how sensational the trip was, so you breathe deeply and just enjoy the moment without caring about any other thing in life. This trip combines a large amount of quite contrasting environments and ecosystems, from the lush humid Yungas cloud forest to dry high Altiplano and Puna, stopping at various lakes and wetlands on various altitudes and ending on the drier upper Chaco forest. Tropical Birding Tours Northwest Argentina, Nov.2015 p.1 Sam recording memories near Tres Cruces, Jujuy; photo by Andrés V. All this is combined with some very special birds, several endemic to Argentina and many restricted to the high Andes of central South America. Highlights for this trip included Red-throated -
Researchers Document Aviary Eggshell with Iridescence for the First Time 10 December 2014, by Bob Yirka
Researchers document aviary eggshell with iridescence for the first time 10 December 2014, by Bob Yirka they found to be made of calcium phosphate, calcium carbonate, and some other yet to be identified organic compounds) which gave the egg its glossy sheen. When they removed the cuticle from a portion of an egg sample—they found that it was blue underneath, but that the iridescence was gone. Thus, they concluded that the iridescent blue was due to a combination of the pigment and Photographs (a–c) of T. major, E. elegans and N. cuticle. maculosa nests. Average length breadth of eggs (a–c): 58 48 mm, 53 39 mm and 40 29 mm. Photo credits: The researchers can't say for sure why the bird Karsten Thomsen, Sam Houston and Shirley eggs have such features as they would appear to Sekarajasingham. Journal of the Royal Society Interface, draw attention to them, rather than help keep them Published 10 December 2014 . DOI: 10.1098/rsif.2014.1210 hidden. It seems possible that the iridescence actually causes the eggs to be more difficult to see in their particular environment to a particular type of prey. More likely, the researchers suggest is that (Phys.org)—A team of researchers with members eggs that stand out can be more easily spotted or from New Zealand, Czech Republic and the U.S. differentiated from other eggs from birds of the has documented for the first time an example of an same species, which could serve as a means of aviary egg that has iridescence. In their paper encouraging males to assist with incubation. -
Eudromia Formosa)
ISSN 0326-1778 y ISSN 1853-6581 HISTORIA NATURAL Tercera Serie Volumen 6 (1) 2016/25-39 NOTAS ECOLÓGICAS SOBRE LA MARTINETA CHAQUEÑA (Eudromia formosa) Ecological notes on the Quebracho crested tinamou (Eudromia formosa) Rebeca Lobo Allende1 y Patricia Capllonch2 1Universidad Nacional de Chilecito, Campus Los Sarmientos, Ruta Los Peregrinos s/n (F5360CKB) Los Sarmientos, Chilecito, La Rioja, Argentina. [email protected] 2Cátedra de Biornitología Argentina y Centro Nacional de Anillado de Aves (CENAA), Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán, Miguel Lillo 205 (4000) Tucumán, Argentina. [email protected] HISTORIA NATURAL Tercera Serie Volumen 6 (1) 2016/13-24 25 LOBO ALLENDE R. Y CAPLLONCH P. Resumen. Estudiamos el uso del hábitat de la Martineta Chaqueña (Eudromia formosa) en el oeste de la provincia de Santiago del Estero, Argentina. Realizamos 202 censos (34 otoño e invierno 2002, 36 primavera 2002, 71 verano 2002-2003, 33 otoño e invierno 2003, 10 verano 2004 y 18 otoño e invierno 2004). El éxito de muestreo (al menos un individuo por muestra) fue del 72%. Encontramos 12 individuos en 1000 hectáreas durante la época no reproductiva distribuidos en 5 grupos y 22 individuos a fines de enero (época reproductiva). A diferencia deE. elegans, los grupos eran de no más de 4 individuos, generalmente de 3. Cada grupo en sus aproximadas 200 ha de territorio recorren las sendas lentamente mientras buscan alimento. Prefieren el bosque de quebrachos y algarrobos pero usan también otros ambientes, además penetran en los campos cultivados en busca de insectos. A fines de la primavera y comienzos del verano, en concordancia con la llegada de las lluvias, aumentó un 80% el número de individuos y se observó que a los residentes se unieron individuos de áreas vecinas. -
Amit Wasnik & Shubham Jain
- Amit Wasnik & Shubham Jain What is a Biome? A biome is a geographic area characterized by specific kinds of plants and animals. Deserts, tropical rainforests, and tundra are all types of biomes. In the desert biome many organisms have learned to adapt to the hot climate and lack of supplements. Deserts are formed by mountains blocking the path of precipitation . Deserts can be hot or cold but they are always dry. They receive less than 25 cm of precipitation annually. They cover 22 million km2 or 1/5 of the earth’s surface. Hot Desert eg. Thar, in Rajasthan, India Rub-ab-khali, Saudi Arab . Cold Desert eg. Gobi desert, Mangolia Ica desert, Peru A Desert’s CharacteristicsCharacteristics Climate Seasons Animals Adaptations Plants Significance to humans ClimateClimate The desert is the hottest biome on Earth. It also has its extremes. It can be over 50 degrees during the day and below 32 degrees at night. Less than 25 cm or rainfall every year. The amount of rainfall varies, but when it rains…it POURS!!!! After a storm, the desert may not see any rain for weeks or months. The animals include snakes, owls, mice, armadillo lizards, fennec foxes, gila monsters, bats, and vultures. EndangeredEndangered AnimalsAnimals Black Rhino The major causes of endangered animals Grevy’s in the desert are Zebra mainly poachers and unexpected drought. King Cheetah PlantPlant LifeLife ofof DesertsDeserts There are several plants that are able to survive in the desert. Most plants survive by their long roots to reach underground water sources. A Variety of cactuses Prickly Pear Dragon Tree Octillo Plant Desert Spoon Boojum i. -
Grasses Plant List
Grasses Plant List California Botanical Name Common Name Water Use Native Aristida purpurea purple three-awn Very Low X Arundinaria gigantea cane reed Low Bothriochloa barbinodis cane bluestem Low X Bouteloua curtipendula sideoats grama Low X Bouteloua gracilis, cvs. blue grama Low X Briza media quaking grass Low Calamagrostis x acutiflora cvs., e.g. Karl feather reed grass Low Foerster Cortaderia selloana cvs. pampas grass Low Deschampsia cespitosa, cvs. tufted hairgrass Low X Distichlis spicata (marsh, reveg.) salt grass Very Low X Elymus condensatus, cvs. (Leymus giant wild rye Low X condensatus) Elymus triticoides (Leymus triticoides) creeping wild rye Low X Eragrostis elliottii 'Tallahassee Sunset' Elliott's lovegrass Low Eragrostis spectabilis purple love grass Low Festuca glauca blue fescue Low Festuca idahoensis, cvs. Idaho fescue Low X Festuca mairei Maire's fescue Low Helictotrichon sempervirens, cvs. blue oat grass Low Hordeum brachyantherum Meadow barley Very Low X Koeleria macrantha (cristata) June grass Low X Melica californica oniongrass Very Low X Melica imperfecta coast range onion grass Very Low X Melica torreyana Torrey's melic Very Low X Muhlenbergia capillaris, cvs. hairy awn muhly Low Muhlenbergia dubia pine muhly Low Muhlenbergia filipes purply muhly Low Muhlenbergia lindheimeri Lindheimer muhly Low Muhlenbergia pubescens soft muhly Low Muhlenbergia rigens deer grass Low X Nassella gigantea giant needle grass Low Panicum spp. panic grass Low Panicum virgatum, cvs. switch grass Low Pennisetum alopecuroides, cvs. -
Redalyc.Reproductive Features of Chaltenobatrachus Grandisonae
Revista Chilena de Historia Natural ISSN: 0716-078X [email protected] Sociedad de Biología de Chile Chile CISTERNAS, JAVIERA; CORREA, CLAUDIO; VELÁSQUEZ, NELSON; PENNA, MARIO Reproductive features of Chaltenobatrachus grandisonae (Anura: Batrachylidae) within a protected area in Patagonia, Chile Revista Chilena de Historia Natural, vol. 86, núm. 3, 2013, pp. 365-368 Sociedad de Biología de Chile Santiago, Chile Available in: http://www.redalyc.org/articulo.oa?id=369944186013 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative REPRODUCTION OF CHALTENOBATRACHUS GRANDISONAE 365 REVISTA CHILENA DE HISTORIA NATURAL Revista Chilena de Historia Natural 86: 365-368, 2013 © Sociedad de Biología de Chile NATURAL HISTORY NOTE Reproductive features of Chaltenobatrachus grandisonae (Anura: Batrachylidae) within a protected area in Patagonia, Chile Características reproductivas de Chaltenobatrachus grandisonae (Anura: Batrachylidae) en un área protegida en Patagonia, Chile JAVIERA CISTERNAS1,2,*, CLAUDIO CORREA1,3, NELSON VELÁSQUEZ2 & MARIO PENNA2 1Aumen o el Eco de los montes, Organización No Gubernamental, P. O. Box 393, Coyhaique, Chile 2Universidad de Chile, Facultad de Medicina, Instituto de Ciencias Biomédicas, P. O. Box 70005, Santiago, Chile 3Pontifi cia Universidad Católica de Chile, Departamento de Ecología, Alameda 340, P. O. Box 6513677, Santiago, Chile *Corresponding author: [email protected] Basso et al. (2011) assigned the monotypic Reproductive mode is defined by genus Chaltenobatrachus for the species a combination of characteristics including described originally as Telmatobius grandisonae breeding site, clutch structure, location of Lynch, 1975 (later transferred to the genus egg deposition, larval development site and Atelognathus by Lynch 1978). -
The Patagonian Herpetofauna José M
The Patagonian Herpetofauna José M. Cei Instituto de Biología Animal Universidad Nacional de Cuyo Casilla Correo 327 Mendoza, Argentina Reprinted from: Duellman, William E. (ed.). 1979. The South American Herpetofauna: Its origin, evolution, and dispersal. Univ. Kansas Mus. Nat. Hist. MonOgr. 7: 1-485. Copyright © 1979 by The Museum of Natural History, The University of Kansas, Lawrence, Kansas. 13. The Patagonian Herpetofauna José M. Cei Instituto de Biología Animal Universidad Nacional de Cuyo Casilla Correo 327 Mendoza, Argentina The word Patagonia is derived from the longed erosion. Scattered through the region term “Patagones,” meaning big-legged men, are extensive areas of extrusive basaltic rocks. applied to the tall Tehuelche Indians of The open landscape is dissected by transverse southernmost South America by Ferdinand rivers descending from the snowy Andean Magellan in 1520. Subsequently, this pic cordillera; drainage is poor near the Atlantic turesque name came to be applied to a con coast. Patagonia is subjected to severe sea spicuous continental region and to its biota. sonal drought with about five cold winter Biologically, Patagonia can be defined as months and a cool dry summer, infrequently that region east of the Andes and extending interrupted by irregular rains and floods. southward to the Straits of Magellan and eastward to the Atlantic Ocean. The northern boundary is not so clear cut. Elements of the HISTORY OF THE PATAGONIAN BIOTA Pampean biota penetrate southward along the coast between the Rio Colorado and the Rio In contrast to the present, almost uniform Negro (Fig. 13:1). Also, in the west Pata steppe associations in Rio Negro, Chubut, gonian landscapes and biota enter the vol and Santa Cruz provinces, during Oligocene canic regions of southern Mendoza, almost and Miocene times tropical and subtropical reaching the Rio Atuel Basin. -
Introductory Grass Identification Workshop University of Houston Coastal Center 23 September 2017
Broadleaf Woodoats (Chasmanthium latifolia) Introductory Grass Identification Workshop University of Houston Coastal Center 23 September 2017 1 Introduction This 5 hour workshop is an introduction to the identification of grasses using hands- on dissection of diverse species found within the Texas middle Gulf Coast region (although most have a distribution well into the state and beyond). By the allotted time period the student should have acquired enough knowledge to identify most grass species in Texas to at least the genus level. For the sake of brevity grass physiology and reproduction will not be discussed. Materials provided: Dried specimens of grass species for each student to dissect Jewelry loupe 30x pocket glass magnifier Battery-powered, flexible USB light Dissecting tweezer and needle Rigid white paper background Handout: - Grass Plant Morphology - Types of Grass Inflorescences - Taxonomic description and habitat of each dissected species. - Key to all grass species of Texas - References - Glossary Itinerary (subject to change) 0900: Introduction and house keeping 0905: Structure of the course 0910: Identification and use of grass dissection tools 0915- 1145: Basic structure of the grass Identification terms Dissection of grass samples 1145 – 1230: Lunch 1230 - 1345: Field trip of area and collection by each student of one fresh grass species to identify back in the classroom. 1345 - 1400: Conclusion and discussion 2 Grass Structure spikelet pedicel inflorescence rachis culm collar internode ------ leaf blade leaf sheath node crown fibrous roots 3 Grass shoot. The above ground structure of the grass. Root. The below ground portion of the main axis of the grass, without leaves, nodes or internodes, and absorbing water and nutrients from the soil. -
Redalyc.The Arid and Dry Plant Formations of South America And
Darwiniana ISSN: 0011-6793 [email protected] Instituto de Botánica Darwinion Argentina López, Ramiro P.; Larrea Alcázar, Daniel; Macía, Manuel J. The arid and dry plant formations of south America and their floristic connections: new data, new interpretation? Darwiniana, vol. 44, núm. 1, julio, 2006, pp. 18-31 Instituto de Botánica Darwinion Buenos Aires, Argentina Available in: http://www.redalyc.org/articulo.oa?id=66944102 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative DARWINIANA 44(1): 18-31. 2006 ISSN 0011-6793 THE ARID AND DRY PLANT FORMATIONS OF SOUTH AMERICA AND THEIR FLORISTIC CONNECTIONS: NEW DATA, NEW INTERPRETATION? Ramiro P. López1, Daniel Larrea Alcázar2 & Manuel J. Macía3 1Associate Researcher, Herbario Nacional de Bolivia. Campus Universitario, Cotacota, calle 27 s/n, Casilla 3- 35121, La Paz, Bolivia; [email protected]; (author for correspondence). 2Postgrado en Ecología Tropical, Instituto en Ciencias Ambientales y Ecológicas, Universidad de Los Andes. La Hechicera s/n, Mérida 5101, Mérida, Venezuela. 3Real Jardín Botánico de Madrid (CSIC), Plaza de Murillo 2, E-28014 Madrid, España. Abstract. López, R. P., D. Larrea Alcázar & M. J. Macía. 2006. The arid and dry plant formations of South Ame- rica and their floristic connections: new data, new interpretation? Darwiniana 44(1): 18-31. In this study we aimed at testing two hypothesis about the biogeography of South America: (1) the existence of a marked discontinuity in the Andes of central Peru that separates the floras of northern and southern South America and (2) the occurrence of a more or less continuous semi-deciduous forest in South America during the Pleistocene. -
Richness of Plants, Birds and Mammals Under the Canopy of Ramorinoa Girolae, an Endemic and Vulnerable Desert Tree Species
BOSQUE 38(2): 307-316, 2017 DOI: 10.4067/S0717-92002017000200008 Richness of plants, birds and mammals under the canopy of Ramorinoa girolae, an endemic and vulnerable desert tree species Riqueza de plantas, aves y mamíferos bajo el dosel de Ramorinoa girolae, una especie arbórea endémica y vulnerable del desierto Valeria E Campos a,b*, Viviana Fernández Maldonado a,b*, Patricia Balmaceda a, Stella Giannoni a,b,c a Interacciones Biológicas del Desierto (INTERBIODES), Av. I. de la Roza 590 (O), J5402DCS Rivadavia, San Juan, Argentina. *Corresponding author: b CIGEOBIO, UNSJ CONICET, Universidad Nacional de San Juan- CUIM, Av. I. de la Roza 590 (O), J5402DCS Rivadavia, San Juan, Argentina, phone 0054-0264-4260353 int. 402, [email protected], [email protected] c IMCN, FCEFN, Universidad Nacional de San Juan- España 400 (N), 5400 Capital, San Juan, Argentina. SUMMARY Dominant woody vegetation in arid ecosystems supports different species of plants and animals largely dependent on the existence of these habitats for their survival. The chica (Ramorinoa girolae) is a woody leguminous tree endemic to central-western Argentina and categorized as vulnerable. We evaluated 1) richness of plants, birds and mammals associated with the habitat under its canopy, 2) whether richness is related to the morphological attributes and to the features of the habitat under its canopy, and 3) behavior displayed by birds and mammals. We recorded presence/absence of plants under the canopy of 19 trees in Ischigualasto Provincial Park. Moreover, we recorded abundance of birds and mammals and signs of mammal activity using camera traps.