摘要:

The location, physiography and climate of the dune forest in the vicinity of Lake Sibayi is given. The general ecology of the forest, with particular reference to composition and density of trees and shrubs, is outlined. The results are discussed in relation to survival of the most important canopy trees. It is concluded that the forest represents a stable vegetation type, i.e. Climax Dune Forest. A preliminary list of plants collected in the dune forest is appended.

ISSN:0035-919X    

DOI:10.1080/00359197109519117

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0035-919X    

DOI:10.1080/00359197109519118

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

This is the first in a series of papers devoted to the ecology of the sandy beaches of the Cape Peninsula. Conditions on these beaches are described, with special reference to the beaches of Hout Bay, Llandudno, Milnerton and Muizenberg. Tidal conditions, wave-action, beach profiles and sand movements are discussed, while attention is also given to the particle-size distribution of the substrata forming the beaches. The organic content of the sand, its permeability and porosity, and the disposition of the water-tables are all discussed briefly and some data concerning salinities, temperature and pH are presented. Mention is made of the fauna and a list of the more important members of the resident fauna of the beaches accorded special attention is given. There is some attempt to show how the physical factors are interrelated.

ISSN:0035-919X    

DOI:10.1080/00359197109519119

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

This paper gives an account of the present state of our knowledge of the sandy-beach snail,Bullia, on the beaches of the Cape Peninsula. The work deals mainly with the two surf-loving species,B. digitalisandB. rhodostoma, though mention is made ofB. laevissima, a species found in quiet waters. Reproductive behaviour is described for the first time. Much of the work reported concerns chemo-reception and the responses which lead to feeding. Some conclusions are reached with regard to growth and life-span. The distribution of the three species is dealt with, and the factors responsible for this distribution are discussed. Attempts to estimate the numbers ofBulliaon Muizenberg beach are described. Some mention is made of water- and heat-relationships, defence mechanisms and parasites.

ISSN:0035-919X    

DOI:10.1080/00359197109519120

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A description of the laboratory rearing ofParechinus angulosus(Leske) larvae is given. The larvae are described from samples taken at intervals during the larval life history. At 15°C in the presence of autotrophic flagellates and diatoms as food, larval metamorphosis occurred 56 days after fertilization. Metamorphosis could be delayed at least eleven days in the absence of a suitable substrate.

ISSN:0035-919X    

DOI:10.1080/00359197109519121

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A description of the laboratory rearing ofEchinolampas (Palaeolampas) crassa(Bell) is given. The larvae are described from samples taken at intervals during the larval life history. At 15°C in the presence of autotrophic flagellates and diatoms as food, larval metamorphosis occurred 41 days after fertilization.

ISSN:0035-919X    

DOI:10.1080/00359197109519122

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0035-919X    

DOI:10.1080/00359197109519123

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0035-919X    

DOI:10.1080/00359197109519124

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0035-919X    

DOI:10.1080/00359197109519116

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor