+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Interspecific variation in the abundance, production, and emergence of Daphnia diapausing eggs

Interspecific variation in the abundance, production, and emergence of Daphnia diapausing eggs

Ecology (washington D C). 79(5): 1699-1710, Y

Despite the ubiquity of dormancy among invertebrates, the demographic ties between the active and dormant stages remain largely unexplored in most systems. Nevertheless, dormant stages could potentially have significant impacts on the ecology and evolution of the active population. In Oneida Lake, New York, populations of the suspension-feeding crustaceans Daphnia galeata mendotae and Daphnia pulicaria produce large numbers of long-lived diapausing eggs, which accumulate in the sediments to densities of over 2.5 X 104 eggs/m2 for D. galeata mendotae and 8.0 X 104 eggs/m2 for D. pulicaria. Sedimentation rates obtained by 210Pb dating suggest that these eggs can remain viable for >125 yr and that these two Daphnia populations have persisted in this system for >200 yr. Total annual production of new diapausing eggs can range from 0 to over 104 new eggs/ m2 of sediment. Annual emergence rates back to the water column are also variable but only range between 0 and 25 Daphnia/m2. Because annual variation in the size of the overwintering water-column population ranges between 0 and 2.5 individuals/L, the contribution of emergence to the development of the spring population is considerable in some years and negligible in others. Despite similar maximum water-column densities, D. pulicaria produces and stores more eggs and has a higher rate of emergence than D. galeata mendotae, suggesting differences in the benthic-pelagic link of these two species. Diapausing eggs greatly increase the generation time of the populations that produce them and therefore have the potential to substantially alter the outcome of community interactions.

(PDF emailed within 0-6 h: $19.90)

Accession: 008902275

Download citation: RISBibTeXText

DOI: 10.2307/176789

Related references

Hatching timing of Daphnia mendotae diapausing eggs of different ages. Fundamental and Applied Limnology 168(1): 19-26, 2007

Chemical interactions, maternal effects and the hatching of Daphnia diapausing eggs. Ergebnisse der Limnologie 0(52): 263-272, 1998

Hatching with the enemy: Daphnia diapausing eggs hatch in the presence of fish kairomones. Chemoecology 15(1): 7-12, 2005

Rotifers from diapausing, fertilized eggs: Unique features and emergence. Limnology and Oceanography 49(4): 41-54, 2004

Role of parthenogenetic natality and emergence from diapausing eggs in the dynamics of some rotifer populations. Hydrobiologia 320(1-3): 168-178, 1996

Nonrandom sexual reproduction and diapausing egg production in a Daphnia hybrid species complex. Limnology and Oceanography y; 49(4): 1393-1400 (Part 2), 2004

Geographic and genetic variation in time required for emergence of diapausing Heliothis zea. Annals of the Entomological Society of America 69(2): 261-265, 1976

Resting eggs of lake daphnia i. distribution abundance and hatching of eggs collected from various depths in lake sediments. Freshwater Biology 22(3): 459-470, 1989

Expression of a bimodal emergence pattern in diapausing and non-diapausing Delia floralis: a phenological survival strategy. Entomologia Experimentalis et Applicata 107(2): 163-166, 2003

Interspecific hybridization between daphnia hyalina daphnia galeata and daphnia cucullata and seasonal abundances of these species and their hybrids. Forro, L And D G Frey (Ed ) Developments in Hydrobiology, 35 Cladocera; Symposium, Budapest, Hungary, August 12-16, 1985 Xi+351p Kluwer Academic Publishers: Dordrecht, Netherlands; Hingham, Massachusetts, Usa Illus 213-218, 1987

Comparative changes of ecdysteroid content in Bombyx mori eggs in diapausing and non-diapausing development. Comparative Biochemistry and Physiology A: 893: 503-509, 1988

Interspecific and intraspecific variation in acute thermal tolerance of daphnia. Physiological Zoology 58(3): 350-355, 1985

Life-history variation related to the first adult instar in daphnids derived from diapausing and subitaneous eggs. Hydrobiologia1: 157-164, 2001