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Rio Grande Agricultural irrigation Riparian habitat for various species Rio Grande silvery minnow Southwestern willow flycatcher Lotic ecosystem Sandy composition Many tributaries feed it Explain lotic Move minnow under riparian and add another species Transition: tributaries….such as the rio salado found here in this part of the state http://upload.wikimedia.org/wikipedia/commons/5/55/Riogrande_watershed.png
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Janet Garcia Ayesha Burdett
The Effects of Sediment Disturbance on Invertebrate Communities at
the Confluence of the Rio Grande and Rio Salado Janet Garcia Ayesha
Burdett Rio Grande Agricultural irrigation
Riparian habitat forvarious species Rio Grande silvery minnow
Southwestern willowflycatcher Lotic ecosystem Sandy composition
Many tributaries feed it Explain lotic Move minnow under riparian
and add another species Transition: tributaries.such as the rio
salado found here in this part of the state Rio Salado Confluence
-a confluence is where two rivers meet
-this area has a heterogeneous mix of sediments -as habitat hetero
-because of these habitats it is interesting to look at how
heterogenous environmets affect macroinvertebrate communites
Macroinvertebrate Communities
Live in water all or mostof their life Indicators of loticecosystem
health Survival H2O quality pollutants =diversity Provide energy
tohigher trophic levels -they are seen as food by other larger
inverts and vert species Sediment disturbance Macroinvertebrates:
Periphyton: Sediment disturbance Macroinvertebrates: Periphyton:
Sediment disturbance Macroinvertebrates: Periphyton: Research
Question How does the heterogeneous habitat produced by the Rio
Salado into the Rio Grande affect benthic macroinvertebrate
communities? Work on question!!! Methods Cassie Miller Sampling
sites -3 sites: upper edge of confluence, confluence, and
downstream -4 sediment samples were taken from each site -at all of
these sites we took samples of sediment, minverts and periphyton
-define periphyton Need pics of shizz!!!!!!!! Flow velocity - To
find collection sites: velocity was first determined by floating an
orange 10m downstream and timing it at every site -This was done to
ensure that each research site had similar flow velocity and thus
similar sediment disturbance for each of the replicates at any
given site Jenny Sparks Macroinvertebrate sampling
D Periphyton samplin 1cm core from a 60mlsyringe 4 cores from each
ofthe 12 sample sites Preserved in ethanol Sorted and identified
2ml core from a 60mlsyringe 3 cores from each of the12 sample sites
Samples poured into 50mlcentrifuge tubes Wrapped in aluminum
foilimmediately aftercollection Refrigerated Periphyton sampling
2ml core from a 60ml syringe
3 cores from each ofthe 12 sample sites Wrapped in aluminumfoil
Spectrophotometer Sediment sampling Buckets of sediment Dried
Sieved Spray-painted Sediment Disturbance Results Cassie Miller
Organism Abundance a Taxa Diversity p-value=0.021 a Taxa Diversity
Non-biting midges (Chironomidae) Mayfly (Leptohyphidae)
/0006/49614/lobodiamesa_arcmontage_b_650.jpg Non-biting midges
(Chironomidae) Tricorythodes_newhabitus2.png
Diptera/Ceratopogonidae/Mallochohelea16x12.jpg
picture_2742_large.jpg Mayfly (Leptohyphidae) Biting midges
(Ceratopogonidae) Black fly (Simuliidae)
amago/nematomorpha-amago3.JPG River%20sites/Images%20for%20Site/
pseudocloeon_apache_lateral_habitus.jpg
image/0010/49069/oligochaete_oratia_falls_hotel_
_98xmontage_b_650.jpg Horsehair worms (Phylum: Nematomorpha)
wGqqvLsq.IMG_1191.JPG Caddisfly (Hydropsychidae) Aquatic worms
(Subclass: Oligochaeta) Mayfly (Baetidae) Taxa Distribution Family
Upper-confluence Confluence Downstream
Chironomidae 3.5 7.75 6.75 Oligochaeta 1 1.5 Nematomorpha 2.33
Leptohyphidae 4 Hydropsychidae Simuliidae Baetidae Ceratopogonidae
Biotic Index a Explain the biotic index aka taxa tolerance
values
The lower # on 0-10 scale, the more sensitive the organism aka the
healthier the ecosystem Chlorophyll a Abundance Sediment
Disturbance Future Directions Collect macroinvertebrate diversity
data post-monsoon season to compare to pre-monsoon Post-monsoon =
higher Q = more h2o= moves coarse sediments (talk) Acknowledgements
Ayesha Burdett Amaris Swann Ben Specter Jenny Sparks
Morgan Matthews Cassie Miller Emily Kottler Shane Piaso Ari Ananda
National Science Foundation University of New Mexico Sevilleta
National Wildlife Refuge Sevilleta LTER New Mexico Museum of
Natural History and Science Add -usfws -museum logo