An hour and a half hike up the Hitoy Cerere River in the biological reserved named for the river, Boa and I came across the pictured waterfall spilling into the Hitoy. The name of the river comes from a language spoken by Native Americans in Costa Rica, and I think it translates to describe the clear water and rounded rocks covering the river bed.
The reserve is hidden away up the mountains from Dole’s banana plantations in Valle La Estrella (see the map below) and protects part of Rio Hitoy Cerere’s watershed and most of a few other smaller tributaries draining from the north. Guessing from experience in temperate and tropical systems, I’d estimate Hitoy to be a 5th order stream: large and open, but not reliably navigable. Further, the river is superficially similar to that in another reserve I’ve had the opportunity to visit near San Ramón – the San Lorencito in Reserva Biológica Alberto Manuel Brenes. The cline is certainly not as steep, and the fish assemblage is more substantial (i.e., high abundances of characids and greater fish diversity) due to the lower elevation of Hitoy, but the surrounding/riparian forests and soils are appear similar. ANAI, a group developing biomonitoring techniques for Costa Rica water ways, has used Hitoy as a referencing point for both aquatic invertebrates and fishes. Now… all I need is to develop a proposal examining elevational gradient effects on invertebrate and fish communities important in Costa Rican biomonitoring… then I can work in these unbelievably beautiful stream locations. |
Tag Archives: Research
Stable isotope collection
Some pictures of poles
Within my fence at PV, I have several poles designating sites where my decomposition bundles were attached. Here’s a last set of photos before I took the poles out (with the help of another IRES student, Michelle).
Notice the depth in the last photo – the wooden fence post stands about 6’ 5’’ from the wetland bottom. I’m not exactly bending down to take a photograph with the vegetation in the foreground….
Last bundle collection
Electricity and a panorama
More decomposition bundle collection
A few more photographs of the second collection period. It was a cloudy, humid morning, and the colors turned out a bit differently than last time because I know nothing about white balance. Additionally, a whole subset of photo I took where more or less ruined by the humidity – condensation had formed on my lens and made the images fuzzy. I’ve included one of those images though.
Diversity effects on decomposition field collection
A couple of days ago, I collected a set of decomposing plant material bundles for my diversity effects on decomposition study. Again, this sequence illustrates some of the methods used to collect the ‘decomposition bundles’ – a combination of dead macrophyte tissue from one to five species, wrapped up with a zip-tie and attached to a string. Replicates are attached to the poles shown here and below (there are five).
Briefly, I uncovered the bundles, carefully sniped them from the string, placed them on a white tray, and bagged them in Whirl-Paks. From there, there is lab processing, which I’ll hopefully have a similar post for soon… |