Download PDF by R. J. Scholes: An African Savanna: Synthesis of the Nylsvley Study

By R. J. Scholes

ISBN-10: 051156547X

ISBN-13: 9780511565472

ISBN-10: 0521419719

ISBN-13: 9780521419710

ISBN-10: 0521612101

ISBN-13: 9780521612104

Savannas disguise nearly half the African land floor and one 5th of the land floor of the realm. they're the most very important, yet least understood terrestrial ecosystems. they're the foundation of the African cattle and the flora and fauna they help is of key value in bringing in travelers. The Nylsvley sector in South Africa is likely one of the so much intensively studied savanna areas on this planet and as such it's a key resource of knowledge and conception with regards to this significant tropical biome. The South African Savanna Biome Programme was once manage to enhance the knowledge essential to expect adjustments within the surroundings balance precipitated via either common and man-made stresses. This booklet presents a synthesis of the programme's 16 years of study at Nylsvley and goals to strengthen a unified imaginative and prescient of the ecology of the dry savanna.

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Additional info for An African Savanna: Synthesis of the Nylsvley Study

Example text

Fine-leafed savanna # -I a W 2 >. i« is t S2 ^ | 8 ! O J I! (0 Q A(D ! H £ c lv MS 4J ^ (D OS •H irl H (DIM •H fj 03 11 111 Us! 2 (Q •rl (I) (0 E(0 c •H (0 CD (1) )J3 d) •rl u -0 p (0 •rl •rl rl 0 •nl DN (1) ' , :: ro 0} (1) 1 tf0 H (0 hi- •H ll)' Hc «' d (0 (0 «i c E. ho )H 2 (0> ID • I. HX Q(D •(D C3 flfl ^0 3 •H -H ! HOJU! MO H 03 52 The Nylsvley biota terms, this means that less than half the species are different between the most extreme plots. It therefore seems more appropriate to treat the broadleafed vegetation of the study site as a single, continuously varying unit than as several discrete units.

The breakup of Gondwanaland about 120 My ago lead to the formation of the present-day oceans and a series of coolings. Around 25 My BP the interior of southern Africa was probably a mesic woodland or subtropical forest. This was the period of the evolutionary radiation of grasses and the bovid fauna of Africa (Vrba 1985). The present east-west rainfall gradient in southern Africa was established about 5 My BP. Early hominid and other fossil evidence from Makapansgat, 50 km north of Nylsvley, suggests a savanna climate, but at 3 My BP it was a thicker, wetter bushland than at present (Partridge 1986).

4. Soil depth variations within a 200 x 200 m area of the study site. 1. Chemical and physical analyses of nutrient-poor (Hutton Form, Bontberg Series) and nutrient-rich (Hutton Form, Portsmouth Series) soils from the study site at Nylsvley. The data are from Harmse (1977), Whittaker et al. 76 45 Geology, landform and soils 41 The real soil contrasts within the study site are at the second level of the South African classification, the soil series. The series within Hutton and Clovelly Forms are differentiated on the basis of the clay percentage (above and below 6%), the grade of sand (medium or coarse) and the degree of base saturation.

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An African Savanna: Synthesis of the Nylsvley Study by R. J. Scholes

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