Project Isabela
The introduction of invasive species throughout history has terribly harmed biodiversity and ruined ecosystems. Islands suffer the most. Places like Hawaii and New Zealand have been ecologically devastated, with a great many species dying out to the introduction of non-native species. The well-known kākāpō, for example, is critically endangered with less than 250 individuals left largely due to invasive rats, stoats, and cats that consume their offspring. Furthermore, Laysan island of Hawaii lost three endemic bird species and several endemic insect species to extinction following the introduction of rabbits that ate all of the island’s vegetation and subsequently starved to death.
On many islands, however, hope is not lost for threatened endemic species. Project Isabela, a six year project ending in 2006, successfully wiped feral goats from the Galapagos Island. Contributors killed over 140,000 goats in what is called “the greatest eradication project ever undertaken.” Pirates, fisherman, and whalers of the past had left various animals such as pigs and goats for a supply of food when visiting the Galapagos. Beginning in the eighties, the goat population grew out of control. They transformed brush and cloud forest ecosystems into sporadic grassy areas. Galapagos tortoises had to compete with the goats for food which is a lot tougher to access as a tortoise than as a very mobile goat. The Galapagos Environment Facility (GEF) eventually funded the big antigoat operation in 2000 to help rid the islands of invasive species. The National Park acquired New Zealand hunting dogs to seek and kill the goats as well as helicopters to shoot highland goats from the air. Eventually, they even used ‘Judas’ goats; they sterilized several female goats, equipped them with tracking devices, gave them hormones to keep them in heat longer, and released them to find the remaining herds. While the goat slaughter proved a great success, the Galapagos still has more to worry about. Rats and feral cats continue to pose a big problem to tackle today as well as the 700 or so introduced plant species on the islands. Introduced pathogens could harm the Galapagos more than any other introduced species. If West Nile Virus makes it to the islands, the birds and others of the Galapagos would likely suffer extensively, with the more vulnerable species perhaps going extinct.
Although introduced species cause ecological nightmares on isolated islands, these issues can often dissolve when people care and put significant effort into fixing them. While invasive species have the potential to drive many Galapagos flora and fauna to extinction, like what occurred in Hawaii and New Zealand, people can reverse existing damage with bold campaigns like Project Isabela. Protecting biodiversity is key to the long term survival of the human race.
Posted by Calvin Keating (2).
Jerry Guo. Sep 15, 2006. The Galapagos Islands Kiss their Goat Problem Good-bye. Science. [October 1, 2023]; Volume 313 Issue 5793.
Hi Calvin! It's almost funny how many times the Galápagos Islands come up when discussing ecology. The area is a prime example of different evolutionary principles like foster effect and adaptive radiation as well as was the place where the idea of evolution itself first started. The eradication of invasive goats is certainly another way that the Galápagos Islands continues to make history to this day. Your blog post just makes me wonder what ecosystems around the world would look like if invasive species were removed. I didn't realize exactly how much power invasive species have on not only the other animals in the area, but also the plant biodiversity.
ReplyDeleteHi Jill! I also found it inspiring that they made this progress at reversing one of the many issues the island possesses. I found it really wild how many invasive species have settled on the Galapagos. It seems like the conservationists over there have infinite work to do in terms of restoring the Galapagos to i something like it’s original ecological conditions. I had previously thought the Galapagos had few issues when I heard how well protected it is but I was wrong. Surely many of the hundreds of introduced organisms might seem to pose little threat but altogether the effect is rather significant, especially when looking to the very long term future. I think it’s very important that they are proactive at ridding invasive species like they did with rock pigeons, who posed little immediate threat but could eventually become problematic. I wish I could go back in time and see what such places were like before humans introduced invasive species.
DeleteThat last comment was by me - Calvin Keating
DeleteThis is really interesting. I have seen similar examples of this done throughout the United States as well, but nothing to this scale. It goes to show how delicate the ecological balance can be in certain environments. It puts pressure on us to try and maintain these balances so that the organisms living there can prosper. But, as of recent with increases in deforestation and settlement, we seem to not worry about interrupting this balance. In some ways, we are the invasive species for thousands of organisms around the world.
ReplyDeleteI agree with you Sid. It seems that any place touched by humans loses biodiversity. I also think that it is understated how important biodiversity is in the long run. I think more efforts need to be made to demonstrate why biodiversity is important. Many people definitely do not keep biodiversity or preserving the environment in mind when constructing. Small isolated environments clearly suffer more than other places but this idea is also more apparent because the ruin of many such non-island ecosystems has already occurred. Furthermore, tropical places are harder to develop and richer in biodiversity; a lot of ecological harm seems to be ahead for South American countries and elsewhere.
Delete- Calvin Keating
DeleteHi Calvin! I love the Galapagos Island! This is such a talked about island in biology classes as its famously known for its wildlife and as the inspiration for Darwin's theory of evolution. Although reading about the slaughter and eradication of the goats on this island was a little disturbing (I am an empath), I understand that this is crucial in protecting the biodiversity and in managing the invasive species. Reading about the methods in which Project Isabela implemented for the goat eradication was interesting, especially 'Judas' goats, and makes me want to learn more about other programs like this one.
ReplyDeleteHi Donna! I am actually visiting the Galapagos in January for a couple weeks to briefly study abroad. I agree that the goat slaughter is rather nasty and I would not enjoy being a goat eradicator in the program myself. I enjoy eating meat as well but I am grateful I don't have to be the butcher. I think the Judas goat idea was very interesting as well - what a clever way to locate the other goats. I wonder if they will employ similar strategies with other animals in the future. There are plenty of islands elsewhere that greatly need such mammal eradication to ensure the future of their native wildlife.
Delete- Calvin Keating
DeleteHi Calvin. I enjoyed reading your blog. This is an important topic to write about. Invasive species are mostly introduced by humans and its not fair for the existing animals that inhabit that area to become endangered due to humans. The attempt of Project Isabela trying to bring back control and restore what it used to be is a great direction for the betterment of the ecosystem. If species keep becoming extinct, then we will slowly see its affect on humans. Can you expand on the affect of invasive species on humans?
ReplyDelete- Lorena Soldevilla