Population dynamics and adaptive strategies of Martiodrilus carimaguensis (oligochaeta, glossoscolecidae), a native species from the well-drained savannas of Colombia

By:

Jiménez Jaén, Juan José

Contributor(s):

Material type: Article

ArticleLanguage: English Description: p. 69-78Subject(s): LOC classification:

QH 84 .8 N3

Online resources:

Click here to access online

In: In: Jiménez Jaén, Juan José; Thomas, Richard J. (eds.). Nature's plow: Soil macroinvertebrate communities in the neotropical savannas of ColombiaSummary: Martiodrilus carimaguensis (Oligochaeta, Glossoscolecidae) is a large, anecic native earthworm species which was found in natural and disturbed savannas in the Oxisols of the Colombian Llanos. The population dynamics of this species were studied in a native savanna, and in a 17-year-old grazed grass-legume-pasture where density and biomass were higher. Monthly cast deposition on the soil surface in the improved pasture was 38.4x10 3 fresh casts/ha, 11 times greater than in the native savanna. A strong relationship was found between numbers of M. carimaguensis and numbers of fresh surface casts. Different patterns of adaptation to the dry season were observed for adults and juveniles. Adults are active for 8 months whereas juveniles enter diapause 3-4 months earlier. The vertical distribution pattern of the earthworm population also shows marked seasonal changes.

Tags from this library: No tags from this library for this title.

Average rating: 0.0 (0 votes)

Holdings ( 2 )
Title notes ( 1 )

Holdings
Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Books	CIAT Library CIAT Publications	CIAT Publications	QH 84 .8 N3 (Browse shelf(Opens below))		Available
Book Chapters	CIAT Library Web	Electronic Document	QH 84 .8 N3 (Browse shelf(Opens below))	c.1	Available

Total holds: 0

Martiodrilus carimaguensis (Oligochaeta, Glossoscolecidae) is a large, anecic native earthworm species which was found in natural and disturbed savannas in the Oxisols of the Colombian Llanos. The population dynamics of this species were studied in a native savanna, and in a 17-year-old grazed grass-legume-pasture where density and biomass were higher. Monthly cast deposition on the soil surface in the improved pasture was 38.4x10 3 fresh casts/ha, 11 times greater than in the native savanna. A strong relationship was found between numbers of M. carimaguensis and numbers of fresh surface casts. Different patterns of adaptation to the dry season were observed for adults and juveniles. Adults are active for 8 months whereas juveniles enter diapause 3-4 months earlier. The vertical distribution pattern of the earthworm population also shows marked seasonal changes.