Categories
Environment Medical Population

Integrate Population, Health and Environment

            If we had unlimited resources we wouldn’t need to be concerned about human population. We live in a wonderful, rich world, but we need to share with such a large number of people and other living beings.

Some of the richest places on Earth have been called “biodiversity hotspots”. These 35 special areas are home to many endemic species—species that are unique to that one area. Although the hotspots make up only a small fraction of the Earth’s surface (about a 40th), they are home to such a variety of life that isn’t found anywhere else. The sad thing is that much of this wonderful diversity is already lost, and what is left is threatened with extinction.

Hotspots are also fertile spots. People are attracted to settle in them to exploit this productivity. Indeed, it is this humanity that threatens to destroy the fecundity. Fortunately a relatively new constellation of services offers help in a very humane way.

Population-Health-Environment (PHE) programs are the new way to slow damage to hotspots. Starting with the “E”, the first step is to help the local people be more aware of the value of the wonderful place where they live. The locals learn how they depend on ecosystem services, such as mangrove trees that serve as nurseries for fish. A clinic provides simple health care and health education, which are unusual in hotspots. Voluntary family planning is made available along with other health services. Often local women learn to be advocates for family planning and can administer certain modern contraceptive methods.

Many years ago we visited a PHE in Peru. It is the brainchild of an eccentric research scientist turned humanitarian, Eleanor Smithwick. Peru Amazon Conservation is based the small town of Atún Cocha. As Eleanor points out, the mestizo people there have lost their indigenous respect for nature. In the past they felled trees to sell for lumber, but didn’t replant; Eleanor taught them the value of raising saplings.

Eleanor recruited a local bilingual man, Clever Hoyos, to be the health educator. He taught about conservation as well as sanitation and nutrition. Together they set up a clinic that serves 14 villages and about 2500 people.

Their innovation was their family planning program. Most of the people live far from Atún Cocha along the river where the only means of transportation is a slow dugout canoe. On a certain Thursday every 3 months Clever would travel by boat to give DMPA (DepoProveraâ) injections. The women knew when to expect the boat and would be waiting at the dock. This was a very popular program, but unfortunately the cost of the medication rose so high that the program wasn’t sustainable.

A more recent and elaborate PHE program is half a world away in Madagascar. A British physician who loves to SCUBA dive became distressed by the destruction of the ocean life. Blue Ventures has an interesting combination of a nonprofit funded by a for-profit business. The for-profit arm features ecotourism and especially diving, but the nonprofit is more difficult to outline.

Blue Ventures not only conserves endangered species such as sea turtles and sharks, but engages the local children in conservation. They provide school scholarships to be certain that future generations are well educated. Because of the risk of overharvesting crops of fish, octopi and sea cucumbers, they have successfully instituted temporary fisheries closures, which have increased total yields—and the fishers’ incomes.

Health services focus on the basics—water and sanitation—as well as clinical services. They use many modalities to reach the people about health and conservation, including radio, interactive village presentations and school workshops using sports and theater.

Blue Ventures have trained 40 local women to provide voluntary reproductive health services to over 20,000 people in 50 communities. The contraceptive prevalence rate has gone from 10% to 55% in just 6 years. They calculate that voluntary family planning has averted more than 750 unintended pregnancies during this period. Most important, perhaps, is that the vast majority of people recognize the links between reproductive health, family size and food security. I wish that were true for more people in the USA!

To quote from the Blue Ventures’ website, “PHE programmes address the interconnected challenges of poor health, unmet family planning needs, environmental degradation, food insecurity, gender inequality and vulnerability to climate change in a holistic way.” They have great potential to keep biodiversity hotspots from being overrun by people. Just as important are the benefits to the people who live in these rich and beautiful areas.

© Richard Grossman MD, 2014

Categories
biodiversity Environment

Keep your Cat Indoors

Two months ago I wrote about finding a family of cats along the trail in the Galápagos Islands. The beautiful kittens would grow up to be murderers of vulnerable animals such as the rare species of hawk unique to the Galápagos. It was with mixed feelings that I learned that a ranger would be dispatched with dogs to obliterate this invasive family.
Can these lovable pets be a hazard here in the USA? Do they cause any problems with wildlife in our backyards?
The answer, unfortunately, is that cats allowed outside can be a serious problem, causing the deaths of billions of small animals.
Once, eating dinner as a kid, Cookie (our family’s cat) proudly joined us with her own meal in her mouth—a robin that she had just caught and killed. Until then we had no idea that she had been hunting in our backyard.
Cookie was not unique. Recent reviews suggest that cats kill huge numbers of small animals. In some cases we benefit from cats’ lethal effect, such as barn cats killing mice and rats. Unfortunately they are also responsible for the slaughter of many birds.
Fortunately not all cats are killers. Indoor cats aren’t given the opportunity to commit mayhem. And some pet cats that go outside leave little critters alone. Feral cats, who survive by tooth and claw, are the most destructive. However, free ranging domestic cats are estimated to kill over 2 billion birds every year in the USA.
Islands are where cats have caused the most trouble. Many unique species have developed in the isolation of islands; Darwin’s finches are a famous example. They are all unique to the Galápagos since they evolved in that remote cluster of islands.
Pirates and other sailors brought cats to the Galápagos over 300 years ago. These four-legged intruders caused a rapid decline in the numbers of birds—and of the unique marine iguanas. A concerted effort to eradicate cats has been successful on some of the islands, with subsequent increases in members of endemic species that live nowhere else. Fortunately, the Galápagos hawk is one of those that is bouncing back due to cat control.
Things didn’t work out so well in the Hawaiian Islands. The black-faced honeycreeper (Po’o-uli) is critically endangered. There are many reasons some birds aren’t doing well in Hawaii; avian malaria, destruction of habitat and killing by predators (including cats) are all serious threats. Of the 33 species of the small, stunning honeycreepers that have existed recently, 12 are now extinct and 9 are critically endangered or probably extinct. Only two honeycreeper species seem safe from extermination.
A recent study of killing by cats divided Felis catus into three categories: those that always stay inside, those pets that have homes but spend time outside, and those that live outside. The latter category includes barn cats whose purpose and livelihood are controlling rodents. It also includes feral cats that have no attachment to humans.
The undomesticated populations are responsible for most, but not all, of the killing. It is estimated that they do away with two to three billion birds each year in the USA, and up to 20 billion small mammals, reptiles and amphibians. They certainly have earned their place on the list of the world’s most destructive exotic species! We know that birds also die from collisions with windows and windmills, but cats destroy a much larger number.
Spying on domestic cats’ habits with cameras attached to their necks suggests that innocent-appearing Fluffy may actually be a serial killer. Indeed, indoor pet cats with outdoor access may kill a half billion birds a year in the USA! The story of one pet is shown at: www.pbs.org/pov/catcam/full.php#.UTSpLBlrciJ For more evidence that pet cats might be a closet killers check out “Crittercam” videos at http://www.kittycams.uga.edu/photovideo.html
Animal rights folks focus on protecting cats, but seem blind to the mayhem that cats cause. Feral cats number perhaps 50 million in the USA. Animal rights people have developed two types of programs in an attempt to control them. The Trap-Neuter-Return policy seems most humane because it doesn’t kill these wild creatures. Unfortunately TNR programs allow cats to return to their accustomed lethal pursuits. Euthanizing wild cats is better than TNR since it prevents massacre as well as reproduction.
As loveable as cats are, they can be killers. Devices to make it more difficult for cats to kill wildlife are available; locally, For the Birds carries a couple. It is best to keep cats inside for wildlife’s sake!
© Richard Grossman MD, 2013