Tag Archives: management

An Abridged History of the California Wildfires

California is ablaze, again. So why is this part of the world so notorious for catching fire? (Image Credit: Forest Service, USDA, Public Domain Mark 1.0, Image Cropped)

Recently, I was looking for skiable snow in central Norway when I bumped into a chatty Norwegian man. When I told him I was Californian, he asked why my state was always on fire. The story demanded vocabulary beyond my grasp of the language, so this story is for your benefit, my random friendly Norwegian. This is a story of resource mismanagement, of urbanization, Pocahontas, and a policy that was a bear’s favor.

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Our Responsibility Regarding Invasive Species (A Counterpoint to Mark Davis)

The Eastern Oyster, a species which has a high potential to spread throughout Norwegian waters, but little known ecological effect (Image Credit: James St. John, CC BY 2.0, Image Cropped)

Last week I posted an interview with Mark Davis, an invasion ecologist who has urged caution when rushing to eliminate invasive species from an ecosystem. Whilst I didn’t agree with absolutely everything Mark said, he makes some very important points about the language around invasive species and our understanding of them.

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Finding the Key to Reef Shark Conservation

Species such as this Carribean reef shark have higher extinction risks than most fish. But how effective are our management efforts?

Species such as this Carribean reef shark have higher extinction risks than most fish. But how effective are our management efforts? (Image Credit: Albert kok, CC BY-SA 2.0, Image Cropped)

Reef accessibility impairs the protection of sharks (2018) Juhel et al., Journal of Applied Ecology 55

The Crux

The importance of sharks goes well beyond what Jaws did to Hollywood, or one week in the USA each July. In any reef ecosystem, sharks perform a key functional role, exerting top-down pressure, stabilising food webs, and improving general ecosystem functioning. They’re also ‘charismatic’ species, meaning they’re easier to raise funding for, and bring money in through tourism. Yet pressure from fishing suggests that reef shark populations may be under threat, and with high body sizes and long lifespans, their populations are more sensitive than most to overfishing, making extinction risks higher.

Yet the lack of data on shark populations means that the effectiveness of the few existing management programs is largely untested. This paper looks at Marine Protected Areas (MPAs), areas in which national or international bodies prevent fishing or even entry, to see whether or not they are an effective conservation method for shark populations.

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