Strangers in a Garden
It's beautifully and fittingly scored too. As always with Attenborough documentaries, "Strangers in the Garden" does a great job teaching and entertaining, never ceasing to fascinate. Narration and the presenting by Attenborough helps significantly. He clearly knows his stuff and knows what to say and how to say it.
He delivers it with his usual richness, soft-spoken enthusiasm and sincerity, never talking down to the viewer and keeping them riveted and wanting to know more. There's as always a wide range of emotions from tense conflict, awe and tear-jerking pathos.
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Nothing is episodic and it's all paced and structured beautifully. Altogether, very good end to a terrific series though the previous three episodes fared better for me. Start your free trial. Find showtimes, watch trailers, browse photos, track your Watchlist and rate your favorite movies and TV shows on your phone or tablet! Keep track of everything you watch; tell your friends. Full Cast and Crew. The First Eden —. By then, the devastation was irreversible. Drought, water pollution, red tide events, and the extirpation of native species were already well under way.
Helpless, conservation biologists were forced to stand by and document the decline. Accidental introductions occur as means of mass transport move across continents and seas. On a more local level, seeds become lodged in mowers and tiling equipment, on clothing and shoes.
Others arrive in fruit and vegetable imports. It is often postulated that not all exotic species become invasive. During the years that I monitored the exotic strawberry guava in the Everglades, they seemed to remain stationary. Some exotics then, appear to reach an equilibrium and are kept in check by environmental limiting factors. Especially if their new environment resembles the one from which they originated.
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But this is the exception and not the rule. There are invasive exotics representing just about every genus on almost every continent today. In viewing the scope of the ecological and economic losses associated with allowing these species to proliferate, it is imperative that land managers and conservationists understand the necessity to intervene. Waiting for nature to correct the mistakes of man decades later is futile. It is flawed thinking.
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Several methods for controlling exotic species infestations in the US and abroad have been implemented. These include manual removal, prescribed fires, biological controls, and the various means and methods of herbicidal treatment. It is essential that we understand the risks and benefits associated with these methods. Our chosen method can pose enormous ecological threats that are, in scope, often equivalent to, or worse than the consequences of letting the exotic species flourish. We make judgment calls and are often wrong. It is outside the scope of this discussion to discuss the particular chemicals used in modern herbicides.
However these chemical compounds are manufactured to be tenacious and effective. They do not readily break down as they move throughout the various living and non-living components of our environment. They have been recovered from most of the major river systems and even from streams and groundwater flowing unseen through the earth.
Residues of these chemicals linger in the soils to which they have been applied a dozen years before. This summarizes the scope of the problem from a scientific perspective. But in order for one to fully comprehend the enormity of the problem, one must witness, first-hand, the condition of the sprayed area post-application.
These areas are notoriously easy to locate. They appear withered, and brown. Then of course is the unforgettable smell of the poisoned nearby waterways. Secondary succession- or the plants that return after a disturbance, are the species that can most easily re- establish after the disruption of its environment. In most cases, these are the same non-native species originally targeted forremoval. And so the cycle perpetuates. While herbicide application may sometimes level the playing field for native species, too often it merely prepares the site for yet another exotic infestation.
It hinders the ability of the site to provide for the needs of native species and withholds such toxicity that little else will grow there. Suffice to say, replanting with hearty native species after herbicide application is seldom thought of, and rarely seen in post-treatment management plans, despite observations, decade after decade, that clearly demonstrate that the target species is the most likely to recolonize a treated area. This is especially true in areas whose surface area border urban areas, fence lines, ditches.
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Conclusively speaking, the amount of herbicide currently needed could decline over the coming years if only this single follow-up measure were to be taken. Further to this, a great deal of seed source is often left behind after treatment. The effects of such a chemical could be devastating to non-target species. The labelling of these chemicals are often the result of testing done in controlled environments. Herbicide sprayed on the bark or cut stump of the target species inevitably washes into the soil and finds its way into surface water, groundwater, and aquifers.
After application, they inevitably come into contact with insects, fish and amphibians, who form a large portion of the food chain.
In this way, it concentrates as it reaches top predators in the food chain. It affects herbivorous snails, but a predatory bird who consumes several of these snails carries a higher concentration of the chemical. The large predator who eats several of these birds will carry a large, often fatal dose of the chemical in its tissues, as was seen in the Everglades when several Florida panthers were found to have high levels of herbicides in their tissues.
"The First Eden" Strangers in the Garden (TV Episode ) - IMDb
Animals inevitably succumb to this poisoning. The reality is, we unintentionally destroy a multitude of non-target plants which are each essential to the functioning of the ecosystem as well as animal life. But we do it to prevent future losses. Realizing the futility of herbicide use, the observant and philosophically minded among us might seek answers in true earth-centered ecology.
In his book, Ethics: Respect for Nature, Paul Taylor discusses a non-intervention approach to species and ecosystems: The prohibition against interfering with these entities means that we must not try to manipulate, control, modify or manage natural ecosystems or otherwise intervene in their normal functioning. For any given species population, freedom is the absence of human intervention of any kind in the natural law like processes by which the population preserves itself from generation to generation.
It is a freedom however, that we have forfeited ourselves and stolen from nature, because we have created conditions which now require our continued intervention. Also strikingly relevant here, is his reference to the changing relationships between species within natural communities. When exotic species are introduced to an ecosystem, this principle is violated.
If we follow the reasoning of ecological philosophers such as Leopold and Taylor, we understand that these species establish and DO occur in a new locations. This follows basic biological principles. Species are programed to survive. Monocultures are an indication that the species has been successful in its invasion and subsequent establishment. But they are also an indication of an interrupted process, a manipulated ecosystem.
As a natural consequence, other species, which were less successful at exploiting the resources of that particular habitat, can, and often do vanish. Natural species migrations are indeed, part of the changing relationships Taylor refers to. Seed dispersal occurs via wind, water, and animal feces.
These seeds are are carried across natural boundaries and moved between communities as part of an ever-changing landscape over time. Individuals within a species or a community will out compete each other and seek to broaden their territories. They are fluid, non-stationary, and biologically programmed to expand and spread. And in even in the absence of the troublesome intervention of man, invaders will come. But the devastating alien monocultures we contend with today will not result in ecological homeostasis.
And while man should rightfully attempt to right the ecological wrongs of his predecessors, he is not likely to accomplish this by the distribution of non-selective poison in vulnerable natural areas.
Unusual inhabitants
For when he does this, the ecosystem no longer functions within the natural parameters within which it evolved. It is chemically altered. Audouin's gull is the Mediterranean equivalent of the herring gull, but has green legs and a scarlet, black and yellow beak. Eleonora's falcon is named after a 14th century Sardinian princess who passed laws protecting breeding falcons, to help in the sport of falconry.
Eleonora's falcon was recognised by science in the 19th century. It winters in Madagascar and breeds in the Mediterranean. When it has chicks to feed it catches migrating warblers for them. Be captivated, informed and inspired by the world's wildlife. You must enable JavaScript to play content. Unusual inhabitants Mediterranean islands are popular with people, but some are so isolated that mankind has had little effect there. This clip is from.