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Flightless survivors: Incredible invertebrate diversity in Los Angeles metropolitan area

Date:
April 28, 2016
Source:
Pensoft Publishers
Summary:
Flight is one of nature's greatest breakthroughs. It enables escape, dispersion, and exploration. Lacking flight keeps you grounded -- sometimes for a long time even from evolution's perspective. The Madrona Marsh Preserve is a small nature preserve in one of the world's largest metropolitan areas, which has withstood decades of farming, oil exploration, and development pressures. Surprisingly, a treasure of flightless animals survived.
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A large Solifugid found in the Madrona Marsh Preserve, California, USA.
Credit: Emile Fiesler; CC-BY 4.0

Urban wildlife is surprisingly understudied. We tend to know more about animals in exotic places than about those that live in our cities.

This is why researchers Emile Fiesler, president of Bioveyda Biological Inventories, Surveys, and Biodiversity Assessments, USA, and Tracy Drake, manager of the Madrona Marsh Preserve, looked into the fauna of the Madrona Marsh Preserve, California, a small nature preserve in one of the world's largest metropolitan areas.

Consequently, they published the astonishing number of 689 species of invertebrates, which have managed to survive decades of farming and oil exploration, followed by development pressures, in the open access Biodiversity Data Journal. The study was minimally invasive as the live animals have been recorded with macro-photography.

Even though it is the insects that first developed the ability to fly, long before the dinosaurs became birds, the latter have always received the most of our attention. This major evolutionary breakthrough, which has occurred more than once in the past, is also a reason why insects are currently the most diverse animals on earth in terms of number of species.

"Insects and other invertebrates have filled all ecological niches and all corners of our planet," explain the authors. "No surprise that these small creatures conquered our cities and invaded our homes as well."

Most of the urban dwellers, however, have been introduced -- accidentally or deliberately -- by humans.

"The remainder -- native 'wild' species -- are able to survive in the city mainly due to their adaptivity," they point out. "It is therefore surprising to find a number of flightless species in a small area surrounded by urbanization."

The Madrona Marsh Preserve is located in Torrance, which is part of the Los Angeles metropolitan area. The greater Los Angeles Metropolitan area is one of the world's largest, with a human population of more than 17 million.

The Madrona Marsh Preserve, boasting seasonal wetlands [image 1], is well known as a birdwatchers' paradise. Besides birds, its other vertebrates (mammals, reptiles, amphibians, and fishes), as well as its flowering plants, are relatively well known. The invertebrate fauna of the Preserve, on the other hand, aside from butterflies and dragonflies, was virtually unknown.

Interestingly, night surveys revealed the presence of a 'second shift' diversity, or creatures seemingly complementary to those active during the day.

Among the long-time survivors are wingless camel crickets as well as velvet ants, which are wasps whose flightless females look like furry ants. Another curiosity that intrigued the researchers is an obscure flightless female bradynobaenid wasp [image 2].

The researchers were especially surprised by their encounter with a large Solifugid [image 3] -- also known as Camel Spider or Wind Scorpion. Solifugids are little-known arachnids that are neither spiders, nor scorpions, and can grow up to 15 cm (6 in). Their order's name Solifugae translates from Latin as "those that flee from the sun."

All in all, the biodiversity study resulted in 689 species without a backbone, belonging to 13 classes, 39 orders, and 222 families, found on this island surrounded by urbanization.

"Not unlike the moas and dodos, these 'island' inhabitants stayed grounded through the ages," acknowledge the researchers.


Story Source:

Materials provided by Pensoft Publishers. The original story is licensed under a Creative Commons License. Note: Content may be edited for style and length.


Journal Reference:

  1. Emile Fiesler, Tracy Drake. Macro-invertebrate Biodiversity of a Coastal Prairie with Vernal Pool Habitat. Biodiversity Data Journal, 2016; 4: e6732 DOI: 10.3897/BDJ.4.e6732

Cite This Page:

Pensoft Publishers. "Flightless survivors: Incredible invertebrate diversity in Los Angeles metropolitan area." ScienceDaily. ScienceDaily, 28 April 2016. <www.sciencedaily.com/releases/2016/04/160428132250.htm>.
Pensoft Publishers. (2016, April 28). Flightless survivors: Incredible invertebrate diversity in Los Angeles metropolitan area. ScienceDaily. Retrieved May 23, 2017 from www.sciencedaily.com/releases/2016/04/160428132250.htm
Pensoft Publishers. "Flightless survivors: Incredible invertebrate diversity in Los Angeles metropolitan area." ScienceDaily. www.sciencedaily.com/releases/2016/04/160428132250.htm (accessed May 23, 2017).

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