Images

USGS employee showing the rhizosphere (root zone) of a wetland plant, which is a critical zone for microbiological and biogeochemical processes.

A diversity of birds forage for small fish and invertebrates on fallow fields throughout the year.

The leaves, buds, tendrils, and flowers of a passion flower vine (Passiflora). (Scanned From Negative)

The leaves, buds, tendrils, and flowers of a passion flower vine (Passiflora). (Scanned From Negative)

The leaves, buds, tendrils, and flowers of a passion flower vine (Passiflora). (Scanned From Negative)

Snake cactus that has wrapped itself about the trunk of a Sabal palm on the Gulf coast of Florida. (Scanned From Negative)

The leaves, buds, tendrils, and flowers of a passion flower vine (Passiflora). (Scanned From Negative)

The leaves, buds, tendrils, and flowers of a passion flower vine (Passiflora). (Scanned From Negative)

The leaves, buds, tendrils, and flowers of a passion flower vine (Passiflora). (Scanned From Negative)

Leaves and purple flowers of a railroad vine (beach morning-glory) as it colonizes the sands of a coastal dune on a Gulf coast barrier island

Leaves and purple flowers of a railroad vine (beach morning-glory) as it colonizes the sands of a coastal dune on a Gulf coast barrier island.

Leaves and purple flowers of a railroad vine (beach morning-glory) as it colonizes the sands of a coastal dune on a Gulf coast barrier island. (Scanned From Negative)

Leaves and purple flowers of a railroad vine (beach morning-glory) as it colonizes the sands of a coastal dune on a Gulf coast barrier island.

One of the largest living gumbo limbo trees (Bursera simaruba).

Leaves and purple flowers of a Morning-glory as it colonizes the sands of a coastal dune on a Gulf coast barrier island. (Scanned From Negative)

Leaves and purple flowers of a railroad vine (beach morning-glory) as it colonizes the sands of a coastal dune on a Gulf coast barrier island. (Scanned From Negative)

Decorative stand of the Pampas grass Cortaderia. (Scanned From Negative)

The leaves and flowers of the popular tropical tree, Plumeria. This specimen in Florida has been employed as a landscape ornamental. (Scanned From Negative)

Subalpine meadow near Deer Park campground on the Olympic Peninsula in Washington.

The flower, leaves, and seed pods of a tiny but aggressive vine (Centrosema virginianum) growing beside a path in a central Florida woodland. (Scanned From Negative)

Cory Emerson taking dissolved oxygen, temperature, and salinity readings from a potential relocation site for tidewater gobies in the Point Reyes National Seashore, CA.