Sediment benthic community
Download
1 / 12

Sediment/Benthic Community - PowerPoint PPT Presentation


  • 66 Views
  • Uploaded on
  • Presentation posted in: General

Sediment/Benthic Community. Josh Scott Shaun Lacy John Robbins Owen Means. Outline. Introduction Objectives Hypothesis Methods Results Discussion. Introduction. Landowner objective: Learning potential for small fishery Suitable pond conditions?. Objectives.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha

Download Presentation

Sediment/Benthic Community

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Sediment/Benthic Community

Josh Scott Shaun Lacy John Robbins Owen Means


Outline

  • Introduction

  • Objectives

  • Hypothesis

  • Methods

  • Results

  • Discussion


Introduction

Landowner objective:

  • Learning potential for small fishery

    • Suitable pond conditions?


Objectives

  • Determine composition of sediment

    • % organic matter

    • % water content

  • Estimate density and diversity of macroinvertebrates


Hypothesis

  • High water content equally throughout sediment

  • High organic mater in the top portion of the sediment

  • High concentrations of macroinvertebrates in the shallow areas


Methods

Jones’ pond (15 miles southeast of Moscow)

  • KB-Core

    • Triplicate samples at (2.7 m)

    • Measured, weighed, dried, fried

  • Ekman dredge

    • Triplicate samples at (2.7 m)

    • Sub-sampled, counted organisms


Results

KB-Cores

  • Higher water content deeper in the sediment

  • Higher organic content deeper in the sediment


Results continued

Ekman dredge

Table 1. Macroinvertebrate density from Ekman dredge sampling of Jones’ pond Latah Co., Idaho 2008.


Discussion

Sediment

  • 4cm of sediment accumulation since pond was filled

  • Water content higher at bottom of sediment

    • Opposite of normal results

      Macroinvertebrate

  • Only oligochaetes were found

    • 87,526/m2 (SE 39,577)

    • EPA rating in Detroit River 5,000/m2 (Ciborowski 2008)

    • Farm ponds in Philippines 0-32,000/m2

      • Density positively correlated with high nutrients and/or organic matter (Simpson et al. 2004)


Recommendations

  • Nutrient inputs

    • Difficult to control nutrient inflow from agriculture

      • Try to reduce fertilizer use on and around property

  • Resample to determine sediment accumulation


Literature cited

  • Ciborowski, J. 2008. [Online] Detroit River-Western Lake Erie Basin Indicator Project. Available: http://www.epa.gov/med/grosseile_site/indicators/oligochaetes.html

    • Simpson, I.C., Roger, P.A., Oficial, R., and Grant, I.F. 2004. Density and composition of aquatic oligochaete populations in different farmers’ ricefields. Biology and Fertility of Soils 16: 34-40.


Questions?


ad
  • Login