Ecological Survey of Cibolo Creek at Jacob's Crossing, Cibolo Nature Center, (1/3/2108)

On Wednesday, January 3rd, I took a limited sampling of aquatic invertebrates, several fish, and flying insects. I will expand on this in the near future.

Aerial net was swept at a height of 1-8 feet above the surface of the water over an area of roughly 1000 square feet for a total of about 10 minutes.

Dip net used with kick method in very shallow riffle below water ford at Jacob's Crossing for roughly 10 minutes. Incidentally captured one male Orangethroat Darter.

Dip net was used to sweep through aquatic vegetation in slower, deeper pools and kicked-up leafpacks for total of roughly 10 minutes.

Samples collected from riffle and from pools were kept separate.

Preliminary observations:

Midge larvae were present in both riffle and pools, but were remarkably abundant in pools. Midges seemed to be the predominant taxa, followed closely by small mayflies.

Amphipods were notably absent.

Two apparently different net-spinning caddisfly taxa were abundant in the riffle, more so than in other localities in the Boerne area sampled so far.

Posted on January 8, 2018 03:18 AM by mattgeo1990