Monday, December 07, 2009

Talares de Nahuel-Rucá, Refugio de Vida Silvestre Reserva Mar Chiquita


CARABIDOCENOSIS EDÁFICA DEL TALAR DE NAHUEL RUCÁ

El talar de Nahuel Rucá constituye una de las dos comunidades extrazonales de
Celtis tala Gillies ex Planch (Celtidaceae) del sudeste de la provincia de Buenos Aires.
Presenta gran interés faunístico debido a su asociación con la citada laguna, la cual posee
antecedentes geomorfológicos propios. Por esta razón, se ha encarado un estudio
entomológico global, visto la carencia de antecedentes locales en esta materia, que se inició
en el año 2000 y se halla hoy plena ejecución. Una parte se centró en la fracción de insectos
coleópteros de la familia Carabidae por su íntima relación con los procesos biológicos y
estructurales del suelo (Holliday & Hagley 1978, Edwards et al. 1979, Sotherton 1984,
Marasas et al. 1997, Thyller & Ellis 1979, Kroos & Schaefer 1998, Brussaard 1998, Thomas
& Marshall 1999, Camardelli Uzeda et al. 2000, Marasas 2002, Cicchino et al. 2003). En este
trabajo –en razón del limitado espacio disponible- se dan a conocer los resultados
preliminares emergentes de los primeros dos años de muestreos ininterrumpidos,
consistentes en análizar la riqueza específica de este talar, su afinidad por hábitats
particulares, y comentarios faunísticos relevantes. Por último se destaca el valor de este sitio
como relicto faunístico y las razones que fundamentan su protección y conservación.
Laboratorio de Artrópodos, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad
Nacional de Mar del Plata, Funes 3250, 7600 Mar del Plata, Buenos Aires, Argentina E-mail
cicchino@copetel.com.ar

Adela Lic.Entomología trabajandoen una visita con los chicos de Balcarce






Talares: pequeños bosques autóctonos de
Tala (Celtis tala).













































Monday, November 16, 2009

ST.HILDA ´S COLLEGES,RAMOS MEJÍA




Mar Chiquita Natural Reserve
Handling and Conservation of Natural Resources Program
Park-Ranger Service









Why protect the beach?


Marines birds in Mar Chiquita

Abstract:

Whit a total biodiversity of about 10.000 Sp., birds have colonized almost all the habitats of the world .Despite the oceans cover 60% of the globe , only 3% of these species exploit the effectively the seas .Several other groups of birds use intensively the coast and shorelines , being the oystercatchers, plovers and shorebirds the most conspicuous group .
The low biodiversity observed in the seas is by far countered by the very large biomass provides by this group and the consequent amounts of food consumed .The East and the southeast of Buenos Aires Province in Argentine is characterized by the importance of nonbreeding groups of several seabirds species all the year around.Neotropic Cormorants, American Oyster catchers, four groups gull species , five tern species and the black skimmers are the principal groups included .While some of these birds reproduce in southern Argentine, others breed in the northern hemisphere , both used mar Chiquita lagoon as refueling or wintering area, due to the availability of different food types including intertidal invertebrates and fishes .In this chapter we provided an list of the coast-birds groups present in Mar Chiquita .





Familia scolopacidae
Tringa melanoleuca (Playero patas amarillas grande)
Tringa flevipes (Playero patas amarillas chico)
Actitis macularia (Playerito manchado)
Limosa haemastica (Becasa de mar)
Arenaria interpres (Vuelve piedras)
Calidris alba (Playerito blanco)
Calidris fusicollis (Playerito rabadilla blanca)
Calidris melanotos (Playerito pectoral)
Calidris camutus (Playerito rojizo)
Phalaropus tricolor (Playero nadador)
Micropalama himantopus (Playero zancudo)
Tringites subruficolis (Playerito canela)
Gallinago paraguayia (Becasina común)

Familia laridae
Larus atlanticus (Gaviota cangrejera)
Larus dominicanus (Gaviota cocinera)
Larus cirrosephalus (Gaviota capucho gris)
Larus maculipennis (Gaviota capucho café)
Gelochelidon nilotica (Gaviotin pico grueso)
Sterna trudau (Gaviotin corona blanca)
Sterna hirunde (Gaviotin golondrina)
Sterna superciliaris (Gaviotin chico)

Familia Haematopodidae
Haematopus palliatus


Source: National University of Mar del Plata
Mar Chiquita Park-Ranger Service
June 2005







HYDROGRAPHIC CHARACTERISTICS OF THE MAR CHIQUITA COASTAL
LAGOON ESTUARY

Mar Chiquita is the only coastal lagoon of Argentine that is chokes with a long inlet.
According to its hydrodynamic it can be divided in a freshwater zone , characterized be continental water discharge without tidal effects and an estuarine zone , located from the mouth to the effective limit of tidal influence. Depths typically measured in the estuarine area are between 1, 5-2 m up to 3 m near mouth. Local astronomical tide is characterized as mixed, with semidiurnal dominance and diurnal inequalities. Due to geomorphologic characteristic of inlet this is a hiposincronic estuary were the tidal amplitude decrease toward head. Not only longitudinal wind component but also tides are the main driving force, generating oscillations in water level .Winds from southern quadrant (sw-se) prevent water lagoon outflow increasing the water level, whereas winds from northern quadrant (nw-ne) restrain the oceanic inflow decreasing the water level .These situations are strongly influenced with tides, consequently the former situation matched with spring tide produce an inflow of oceanic water several kilometer inside whereas as the later matched with neap tide restain strongly the oceanic inflow into the inlet. During typical SE storm a large high water level can be observed.
Water temperatures are coupled with air temperatures indicating a strong air- water interaction.

















VEGETACION HISTORY OF THE MAR CHIQUITA COASTAL LAGOON

The vegetation history of Mar Chiquita lagoon was reconstructed from three dates pollen sequences: a Lagunita ,Celpa and Laguna Hinojales Prior to ca 5000yr .Bp the pollen record la Lagunita shows that psammophytic and halophytit communities developed in a sandy barrier and brackish swale environment, when the sea reached the marine transgressive maximum.
During the regressive period, after ca 5000yr Bp, salt marshes developed and became progressively colonized by halophytic communities .Between ca 4000 and 2600 yr.Bp the pollen records La lagunita and Celpa reflect that similar halophytic communities developed in the middle and in the sectors of the present lagoon. At Hinojales pond since ca 4500 yr Bp the pollen record shows that the pond was sited in a environment dominated by a halophytic community.
Since 2600 yr.Bp present plant communities became established at each site: at La Lagunita the halophytic community dominated by Chenopodiaceous reached the maximum development at Celpa the dominance of Poaceae with Asteraceae and Cyperaceous reflects the psammophytic community from the sandy barrier and at Hinojales pond freshwater community dominated by Cyperaceous became established in larger water body pond became restricted after ca 400yr Bp..

BIBLIOGRAPHY: SILVINA STUTZ


























Carrera Turismo y Medio Ambiente ,Universidad CAECE, Mar de Plata







POR QUE PRESERVAR LA BIODIVERSIDAD DEL PLANETA?




VALORES: VISION

ANTROPOCENTRICA

1. Valor instrumental (presente o potencial)

2. Valor inherente (recreacional, medicinal, estético)

3. Valor intrínseco (independiene de valoración humana)



VISION
ECOCENTRICA




• DESTRUCCIÓN DE HÁBITATS (+ degradación, fragmentación) [agricultura]

• EXPANSION INDUSTRIAL (contaminación...) [EFECTOS CASCADA]

• CAMBIO CLIMÁTICO [aceleración???]

• PESQUERÍAS



Conservación Dr Favero 1 UNMDP

ESB Nº6 Mar de Cobo,Partido de Mar Chiquita

Docentes: Eugenia Palozzo,Laura Fraiberguer los chicos de 1ºA









Friday, October 30, 2009

Colegio Paidea



Viaje de Estudios Primer año 2009
Áreas
Biología y Taller de Ciencias



Laguna de Mar Chiquita


En función de las especies antes numeradas, armar 3 cadenas tróficas y
una red para cada ecosistema. Para esto deberán averiguar cuáles forman parte de la misma cadena trófica y cuáles no. Indicar el rol de cada especie en el ecosistema (productor/desconsumidor/consumidor primario, secundario o terciario)








¿Cuál fue el impacto de las actividades del hombre sobre estos espacios naturales? ¿Cómo se relacionan estas actividades con lo trabajado en clase con respecto al impacto del hombre en los ecosistemas?


Técnicas de muestreo

Cada grupo deberá seleccionar un sector, al azar, de 5 m x 5 m. Una vez seleccionado deberán contar el número de individuos de la/s especie/s seleccionadas. Se tomarán los datos durante el recorrido y los cálculos de realizarán en el colegio. Este procedimiento se repetirá dos veces














































































































































































































































































































(Mar Chiquita)