The Science of Sustainability

Keep focus on the Delta… with or without whales

  • share this article
  • Facebook
  • Email


When a humpback whale and her calf took a wrong turn at the Golden Gate Bridge and headed to Sacramento, it drew a lot of eyes (and news media) to the Delta.

But while thousands focused on the plight of the whales, another story was emerging from the Delta– a story that was, as an editorial in the Sacramento Bee noted, perhaps even more dire despite receiving far less ink. The California Department of Fish and Game released the numbers from its annual spring survey of delta smelt population levels. The trawls from March to May counted only 25 juveniles, the fewest ever recorded and a 92% drop from last year's record low.

I wrote in a recent post about the little delta smelt, a fish native to the Delta and upper San Francisco Bay and considered a key indicator of the health of the ecosystem. Even before these latest dismal numbers, scientists feared the species was on the brink of extinction. Their alarm is, if possible, even greater now. Because smelt live only 1-2 years, the window for the species' recovery is slamming shut fast.

Unlike the humpback, the smelt isn’t the kind of charismatic megafauna that traditionally has grabbed the attention and evoked the sympathies of the broader public (though I think there are several on our staff who would argue the smelt is pretty cute and charismatic in its own right). But whether or not you agree with the Bee's assessment that delta smelt "aren't lovable fish," here is a local species, found nowhere else on the planet, disappearing forever right under our noses. And it is not as if we don't know what to do about it. Scientists have outlined actions that could be taken to help protect the remaining smelt. All we need now is the will to act.

That fact that whales can swim to Sacramento is a vivid reminder that San Francisco Bay is not just a crimp in the Pacific coastline but rather part of elegant interlocking chain linking rivers, Delta, Bay, and ocean. Whales don't normally travel up and down that chain, but lots of other species do: from young Dungeness crab who feed and grow in the Bay's brackish waters before heading for the ocean, to delta smelt who migrate back and forth between the upper Bay and Delta, to salmon who make the entire journey.

As we speak, one of those links is in ecological crisis (and we all know what they say about chains and their weakest link). Whales or no whales, we need to keep our focus on the Delta.

Ann Dickinson is Communications Manager for The Bay Institute (www.bay.org), a nonprofit research, education, and advocacy organization dedicated to protecting and restoring San Francisco Bay and its watershed, “from the Sierra to the sea.”

Related

Explore: , , ,

Category: Biology, Environment, Partners

  • share this article
  • Facebook
  • Email
Ann Dickinson

About the Author ()

Before moving to California almost five years ago, Ann served as Sally Brown Fellow in Environmental Literature at the University of Virginia, where she taught undergraduate seminars on literature and the environment and coordinated an ongoing reading series featuring nationally prominent nature writers. Prior to that, she spent a year as a research assistant at the Smithsonian Tropical Research Institute's field station on Barro Colorado Island, Panama, studying how young leaves defend themselves against herbivores.
  • http://kqed.org/quest Craig Rosa

    Perhaps what we need is an official "sister species" program, where we pair a high profile endangered "charismatic" species with an equally-endangered wallflower. For example, literally pair up the humpback whale (Megaptera novaeangliae) with the delta smelt (Hypomesus transpacificus) as you discuss above. Not sure who the sponsoring org/agency would be , but it could operate along the lines of a sister cities program.

    Does anyone know of anything like this in place already? Who would be a good steward of such a program?