JOANNA TENORIO

Escucha una lectura acerca de animales y recursos naturales extintos.

Subraya en el texto las palabras was- were (to be en pasado).

Investiga en el diccionario significados de was y were, así como el de las expresiones de tiempo: ago, last, after y before.

Elabora un glosario.

De la lectura anterior, subraya el pasado del verbo to be en sus formas afirmativa, negativa e interrogativa, y las expresiones de tiempo.

En un cuadro ejemplifica la estructura gramatical de las formas del verbo to be en pasado.

En binas, realiza ejercicios, con base en la lectura previa, donde completes oraciones con was o were según sea el caso

Discute acerca de las consecuencias que acarrea la desaparición de especies animales y vegetales en nuestro ecosistema.

Anota las conclusiones en tu diario.

More than 250 species of plants and 500 animal species are endangered in Argentina.

The data is not less if you think that the conservation of biodiversity and ecological processes, which can support various forms of regional development are key to ensure the current and future welfare of Argentines.

In effect, the progressive and accelerated loss of species due to human causes impairs the quality of life.

 "It is emptying our pantry or medicine cabinet of possible food, medicines, resins, textile fibers and actual or potential resources which, in many cases, do not have time to study or experience. The irreparable this loss is what becomes so worrisome extinction of species compared to other reversible environmental problems, "says Juan Carlos Chebez, naturalist and director of the regional delegation NEA National Park, based in Puerto Iguazú, Misiones.

Among the species that have already disappeared from the Argentine ecosystem, specialist, author of the book "The Argentine to be endangered species." (Editorial Albatros, 1994) - mentions the fox-wolf of the Falkland Islands, the archipelago eliminated late XIX century; the violet-a large macaw parrot palm groves of Corrientes and nearby areas of Brazil, Paraguay and Uruguay and the polar plover, whose last insurance records are from the province of Buenos Aires in the thirties.

In danger

As for endangered species, deer stand or pampas deer, which once was one of the representative species of the Pampas and Mesopotamian fields, chaqueñas open and the Andean Patagonian huemul

As is endangered marsh deer, haunting marshes and waterlogged land in Ibera and the Paraná Delta, with good populations in eastern Formosa and somewhat lower in the Chaco and Santa Fe.

The jaguar is another species in sharp decline.

His last populations remain in the Misiones rainforest in the Yungas Northwest and the dry Chaco transition.

Clearings, poaching, the transformation of the fields in forestation, the progress of urbanization, the construction of high environmental impact, among other things, fragmenting the territories and prevent genetic exchanges.

Areas such as the Chaco region or the humid pampas have been staying, slowly, without its landscapes and original grasslands.

Also, the advance of the agricultural frontier, using the same methods that were used in the Pampas region, to places with water features and different soils, led to an overview of important resource degradation.

Question of State

The problems affecting the conservation of the extraordinary diversity of environments and natural resources in Argentina are multiple and complex.

His treatment is not only a concern of environmentalists or respond to the exclusive interest of non-governmental organizations, but is related directly to the growth and development of the country with sustainable criteria.

"The incorporation of Article 41 in the Constitution, which recognizes the right of all citizens to a healthy environment, is, in that sense, a clear signal.

"In the new century the environmental situation of Argentina should be considered a matter of state," coincide Javier Corcuera and Claudio Bertonatti.

They are authors of "Environmental Situation Argentina 2000", published by the Argentina Wildlife Foundation.

As agronomist Paul Laclau, who works in Patagonia in research projects Forest Program of the National Institute of Agricultural Technology (INTA), focus on the threat to living species has changed over time due largely explains , large impacts globalized.

Until a few years ago the discussion revolved around direct to a plant or an animal threats.

Such are the cases of the risks of excessive extraction of Peteribí in Misiones, walnut trees in the Yungas, Araucaria in the South, turtles and lizards in the Chaco, deer in the pampa and cardinals in the Litoral.

new approach

The intensity and frequency of removal of a species and the recovery rate of the population indicated pursued a path that could not have return.

"Currently, populations -the set of individuals of a species-addition to this direct pressure even more difficult to stop and assess impact: the loss of environmental conditions that allow a species will survive," says Laclau, author two technical reports which include collections of endangered species.

One of his jobs corresponds to the highly endangered; the other, to the Patagonian forests.

Now and extinct species, habitats, including a large number of species become extinct.

"Upon termination habitats also extinguished the environmental conditions that they regulate, so that the effects are accentuated flood, droughts, avalanches, erosion or other physical phenomena in the environment," he explains.

The human factor

If we see the remains of a gliptodonte in a museum, we find that extinction is not a new process.

In fact, based on the fossil record, paleontologists estimate that between one and ten species were lost annually in the evolutionary processes.

"This is not the extinction worries us, because it is natural, as were five mass extinctions that devastated Earth, the last of which ended with the famous dinosaurs 65 million years ago," says Carlos Fernandez Balboa, educator the environmental FVSA.

"The one that reveals is us humans as a key factor of extinction, because we threatened species, subspecies or races, ecosystems and ecological regions, as in the case of our small pampas grasslands," adds Fernandez Balboa.

wildlife extinction

And remember that there are 50 species "extinct in the wild" which survive only in captivity, as in the case of four types of aquatic snails that lived in the rapids of Apipé and were buried by the Yacyreta dam in the world.

"You can remove a sort undermining their ability to adapt to environments occupied by eliminating the resources you need or killing her directly. All that we do," says Laclau.

His proposal to halt and reverse this state of affairs is by strengthening the system of protected areas, to increase the representation of some ecosystems and to adapt its operation to a more focused conservation to the regional situation, including border nations.

That also goes for brake work hard on resolving conflicts with countless people, owners and dealers within national parks.

"The rest of the country, ie 95 percent of its surface, requires conservation work under sustainable management concepts, ie produce under serious social and environmental restrictions," adds Laclau.

The latter specialist also believes that support for small and medium enterprises (SMEs) farming is an indirect way to strengthen the conservation of ecosystems while polluting technologies typically applied in economies of scale are not handled.

"The social and environmental issues are closely linked. The rural marginalization is because of an inequitable model and source of strong impacts on the environment.

"The consolidation of subsistence economies is the only reinsurance to save the species in areas of high poverty," he concludes.

WAS & WERE

Las palabras “was” y “were” pueden tener 4 significados. Es muy importante conocer estos significados antes de analizar la estructura. Los 4 significados dependen del contexto de la oración o la conversación.

Los primeros dos significados se relacionan con el verbo ESTAR y funcionan para todos los pronombres personales:

She was ere yesterday (ella estuvo / estaba aquí ayer)

Los segundos dos significados se relacionan con el verbo SER y funcionan para todos lo pronombres personales:

They were happy in their childhood (ellos eran / fueron felices en su niñez)

MÁS

AGO, LAST, AFTER & BEFORE

ago: hace

last: ultimo

after: despues

before: antes

SENTENCES

He was eating

I was in school

She was all by dancing

They were married

We were Friends

You were working

That was thrown

Carmen was running

John and Peter were playing

CONCLUCION

The disappearance of animal and plant species of our ecosystem will have serious consequences for links in the food chain and animals that depended on others also cease and not have to eat as with plant species will be lost would no longer have much air and veriedad food.