2009 LTER All Scientists Meeting - Statistical Ecology

Aeolian flux of microorganisms in the McMurdo Dry Valleys, Antarctica

Marie Sabacka — Wed, 02 Sep 2009 00:38:14 +0000

Poster Number:

380

Presenter/Primary Author:

Marie Sabacka

Co-Authors:

John C. Priscu

Co-Authors:

Mark C. Greenwood

The McMurdo Dry Valleys in Antarctica (MCM) forms one of the most extreme deserts on Earth. It consists of a mosaic of permanently ice-covered lakes, ephemeral streams, exposed soils, and glaciers. Microorganisms are the only life forms occupying these landscape units. Given the relatively low and seasonal growth rates of these organisms, we contend that the distribution of microorganisms within this environment is controlled by physical factors.

Student Poster:

Yes

Disturbance by Waves Alters The Structure of Kelp Forest Food Webs by Changing Foundation Species Abundance

Jarrett Byrnes — Wed, 01 Jul 2009 18:53:22 +0000

Poster Number:

Presenter/Primary Author:

Jarrett Byrnes

Co-Authors:

Daniel C. Reed

Co-Authors:

Bradley J. Cardinale

Most climate change research has concentrated on the direct effects of environmental change for individual species and their interactions. By affecting key foundation species and ecosystem engineers, however, climate change may have a variety of indirect that may complicate our abilities to predict the response of communities and ecosystems. In California, climate change has increased the frequency and intensity of storms over the last half century. Storms may directly alter the structure of kelp forest food webs via disturbance.

Contrasting patterns of dispersal and gene flow in two populations of red oak

Tomomi Suwa — Thu, 28 May 2009 16:47:05 +0000

Poster Number:

Presenter/Primary Author:

Emily Moran

Co-Authors:

James S. Clark

Oaks are a dominant component of many North American forests, yet in many areas oak seedling production is declining. Oaks are generally thought to be highly dispersal limited, which could hamper reaching scarce recruitment sites and limit oaks’ ability to respond to climate change via migration or local adaptation. In this study, we apply a Bayesian parentage model developed for monoecious plants to two populations of red oak (Q. rubra) in North Carolina: in the Piedmont (12 ha) and the Coweeta LTER in the southern Appalachians (7.5 ha).

Student Poster:

Yes