Cosmogenic P-32 and P-33 in the atmosphere and aligotrophic ocean and applications to the study of phosphorus cycling

Waser, Nathalie

doi:10.1575/1912/5525

Cited by 3 publications

(2 citation statements)

References 90 publications

(165 reference statements)

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“…However, orientation might be improved, especially over longer distances and during the night by the territorial calls given by adult males (FOURIE 1977;. WASER (1975WASER ( , 1977a found that mangabey males (Ceucocebus albigena) caii locate and "monitor" groups in the forest through a characteristic vocalization.…”

Section: Hyrax Numbers and Biomass In Relation To Physical Characterimentioning

confidence: 99%

Population Dynamics, Dispersal and Genetic Isolation in two Species of Hyrax (Heterohyrax brucei and Procavia johnstoni) on Habitat Islands in the Serengeti1,2)

Hoeck

2010

Zeitschrift Für Tierpsychologie

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The rock outcrops or kopjes in the Serengeti National Park are habitat islands. Their most characteristic mammals are the bush hyrax Heterohyrax brucei and the rock hyrax Procavia johnstoni. Thus, these species are particularly suitable for a comparative study of population structure and dynamics as well as other biogeographical processes. Data on group size, composition and dynamics, as well as on dispersal patterns, colonization and genetic isolation are presented, based on 6 years of observations of 2 H. brucei groups and one P. johnstoni group living allotopically on small (area less than 4000 m2) and relatively isolated kopjes. Additional data were obtained from one year of observation of a group of 112 H. brucei living on a large kopje (14 750 m2), from casual observations of hyrax on other kopjes and from observations of two experimentally introduced groups. Zusammenfassung 1. Weder bei H. brucei noch bei P. johnstoni konnte ein markanter Sexual‐dimorphismus festgestellt werden. 190 geschlechtsreife H. brucei wogen im Durchschnitt 1,8 kg und waren 43,2 cm (N = 93) lang; 123 geschlechtsreife P. johnstoni wogen im Mittel 3,1 kg und waren 49 cm (N = 74) lang. Einen signifikanten Gewichtsunterschied gab es nur zwischen Weibchen und Männchen von H. brucei. 2. Die durchschnittliche Gruppengröße bei H. brucei schwankte zwischen 5 Tieren in Kopje K/C und 78 in Kopje SRI ABC, bei P. johnstoni zwischen 2 Tieren in H1 und 26 in PH1. Die Biomasse schwankte zwischen 26 kg/ha (K/C) und 72 kg/ha (SRI ABC) bei H. brucei und zwischen 17 kg/ha (H1) und 87 kg/ha (PH1) bei P. johnstoni. Es bestand eine signifikante Korrelation zwischen der Anzahl der vorhandenen H. brucei und der Kopjefläche, aber keine deutliche Beziehung zwischen der Tierdichte und der Vegetation. 3. In den einzelnen Gruppen überwogen die Weibchen; das Geschlechter‐verhältnis der adulten Tiere (operational sex ratio) schwankte zwischen 1,55 (SRI ABC) und 3,2 (H1) Weibchen je Männchen bei H. brucei und zwischen 1,45 (P1) und 2,0 (PH1) Weibchen je Männchen bei P. johnstoni. Geboren wurden hingegen bei H. brucei 107 Weibchen auf 103 Männchen, bei P. johnstoni 36 Weibchen auf 32 Männchen. 4. H. brucei hat zwei Wurfzeiten, eine von Mai bis Juli, die andere von Dezember bis Januar. Jede Gruppe bekommt ihre Jungen aber nur in einer der angegebenen Wurfzeiten, meist im Zeitraum von Mai bis Juli. P. johnstoni hingegen hatte nur eine Wurfzeit von März bis Mai. Die adulten Weibchen einer Gruppe warfen synchron in einem Zeitraum von ungefähr drei Wochen, H. brucei durchschnittlich 1,6, P. johnstoni 2,4 Junge je Weibchen. 5. Ein signifikanter Unterschied in der Lebensdauer von Weibchen und Männchen zeigte sich in Kopje H1 und H2, aber nicht zwischen den Männchen der beiden Kopjes. Die durchschnittliche Lebensdauer von 17 Weibchen in Kopje H1 betrug 50,6 Monate, die von 11 Weibchen in H2 35 Monate; die Lebensdauer von 19 Männchen in Kopje H1 betrug 19,1 Monate und die von 12 Männchen in Kopje H2 22,6 Monate. Das älteste beobachtete Tier, ein H. brucei‐Weibchen (...

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Section: Hyrax Numbers and Biomass In Relation To Physical Characterimentioning

confidence: 99%

Population Dynamics, Dispersal and Genetic Isolation in two Species of Hyrax (Heterohyrax brucei and Procavia johnstoni) on Habitat Islands in the Serengeti1,2)

Hoeck

2010

Zeitschrift Für Tierpsychologie

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“…Recently four new radiotracers, 32p, 33p, 7Be and 234Th have been used to study the nutrient cycling in the upper ocean (Coale and Bruland 1985;Lal and Lee 1988;Lal et ai 1988;Waser 1993). The concentrations of these radiotracers have been measured in plankton as well as in the water column in the Southern California Bight (SCB) using newly developed techniques.…”

Section: Tracer Datamentioning

confidence: 99%

A critical analysis of processes governing the nutrient profiles in the ocean

Ramesh

Lal

1994

J Earth Syst Sci

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We have theoretically considered the problem of interpretation of nutrient profiles in the upper ocean (100-2000m). We compare the experimental depth profdes of nonconservative tracers, both stable and radioactive, with solutions of one-dimensional steady state transport equations of increasing complexity including situations not encountered in the real oceans. Apart from gaining insight into the nutrient transport processes, this analysis is useful in offering a way to obtain operational estimates of depth dependent/independent eddy diffnsivity and dissolution fluxes in the ocean. These parameters are essential for estimating new production, total production and burial of carbon in the sediments.

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cosmic ray produced ³²P and ³³P in Cl, S and K at mountain altitude and calculation of oceanic production rates

Waser

Bacon

1994

Geophysical Research Letters

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The activities of 32P and 33P induced in Cl, S and K targets during exposure to cosmic rays were measured at Mt. Washington (55.7°N, 1917 m) allowing the in situ production rates of the nuclides to be determined in all the major ocean targets. Furthermore, the production rates of 32P and 33P in Cl, the major ocean target, were determined at three different altitudes in the atmosphere at Woods Hole (53°N, 10 m), Mt. Washington and l'Aiguille du Midi (47.4°N, 3820 m). The exponential attenuation length of the production rates of 32P was found to be consistent with the attenuation length of neutrons in the lower atmosphere at mid‐latitudes. The data allow the in situ oceanic production rates of the nuclides to be estimated at all latitudes.

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Cosmogenic P-32 and P-33 in the atmosphere and aligotrophic ocean and applications to the study of phosphorus cycling

Cited by 3 publications

References 90 publications

Population Dynamics, Dispersal and Genetic Isolation in two Species of Hyrax (Heterohyrax brucei and Procavia johnstoni) on Habitat Islands in the Serengeti1,2)

Population Dynamics, Dispersal and Genetic Isolation in two Species of Hyrax (Heterohyrax brucei and Procavia johnstoni) on Habitat Islands in the Serengeti1,2)

A critical analysis of processes governing the nutrient profiles in the ocean

cosmic ray produced ³²P and ³³P in Cl, S and K at mountain altitude and calculation of oceanic production rates

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Cosmogenic P-32 and P-33 in the atmosphere and aligotrophic ocean and applications to the study of phosphorus cycling

Cited by 3 publications

References 90 publications

Population Dynamics, Dispersal and Genetic Isolation in two Species of Hyrax (Heterohyrax brucei and Procavia johnstoni) on Habitat Islands in the Serengeti1,2)

Population Dynamics, Dispersal and Genetic Isolation in two Species of Hyrax (Heterohyrax brucei and Procavia johnstoni) on Habitat Islands in the Serengeti1,2)

A critical analysis of processes governing the nutrient profiles in the ocean

cosmic ray produced 32P and 33P in Cl, S and K at mountain altitude and calculation of oceanic production rates

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Product

Resources

About

cosmic ray produced ³²P and ³³P in Cl, S and K at mountain altitude and calculation of oceanic production rates