Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

La aplicabilidad del concepto del río continúo en la parte superior de una quebrada

Creator

Nicholas Skaff

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Publication Date

November 2009

Abstract

The applicability of the River Continuum Concept (RCC) to the upper reaches of Quebrada Máquina, a lower montane stream in Monteverde, Costa Rica, was examined. Macroinvertebrate samples were taken from ten points along the stream from first through fourth order segments. The families of the collected individuals were then categorized based on functional feeding group. The similarity between the families found at each collection point was calculated, along with correlations between the functional groups and various stream characteristics. In most cases, RCC predictions did not apply to Quebrada Máquina. The first (first order) and last (fourth order) sample points were 92% similar despite RCC predictions of substantial divergence in relative functional group abundance. This digression from the RCC predictions may be caused by the relatively few differences in stream characteristics between first and fourth order sections. Specifically, the observed similarities and correlations may have been determined by local scale heterogeneity of the stream characteristics. Se estudió la aplicabilidad del Concepto Río Continuo (CRC) en la parte superior de la Quebrada Máquina, una quebrada de montaña baja, en Monteverde, Costa Rica. Las muestras de Macroinvertebrados fueron reunidas de diez puntos en la quebrada en partes del orden primero al cuarto. Las familias de los individuos reunidos fueron clasificadas por grupos de alimentación funcional. La similitud entre las familias encontradas en los puntos fue calculado, junto con las correlaciones entre los grupos funcionales y las características de la quebrada. Muchas veces, las predicciones del CRC no aplican a la Quebrada Máquina. El primero (orden primero) y último (orden cuarto) puntos eran 92% similares, a pesar de las predicciones del CRC con diferencias grandes en la abundancia de los grupos funcionales. La digresión en las predicciones de CRC puede ser causada por las pocas diferencias en las características de la quebrada en las partes del orden primero y el cuarto. Específicamente, las semejanzas y correlaciones observadas podían ser determinadas por heterogeneidad local en las características de la quebrada.

Keywords

River continuum concept, Concepto del rio continuo, Invertebrates, Invertebrados, Costa Rica--Puntarenas--Monteverde Zone, Costa Rica--Puntarenas--Zona de Monteverde, CIEE Fall 2009, CIEE Otoño 2009

Description

Student Affiliation : Department of Biology, Tufts University Born Digital

Subject: topical

River continuum concept; Concepto del rio continuo; Invertebrates; Invertebrados; CIEE Fall 2009; CIEE Otoño 2009

Subject: geographic

Costa Rica--Puntarenas--Monteverde Zone; Costa Rica--Puntarenas--Zona de Monteverde

Genre

Reports

Holding Location

|Monteverde Institute MVI

Identifier

M39-00550

The applicability of the river continuum concept to the upper reaches of a neotropical lower montane stream

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