Monitoring of pollen rain in moss polsters and mats in view of their suitability as controls for determining the air-borne component of pollen spectra in herbivore faeces

Aerobiologia ◽  
1996 ◽  
Vol 12 (1) ◽  
pp. 75-84
Author(s):  
Eric Caulton ◽  
Julie Arnott ◽  
Francesca Primiani
Keyword(s):  
Herbivore Faeces ◽  
Pollen Rain ◽  
Moss Polsters

Monitoring of pollen rain in moss polsters and mats in view of their suitability as controls for determining the air-borne component of pollen spectra in herbivore faeces

Aerobiologia ◽  
1996 ◽  
Vol 12 (2) ◽  
pp. 75-84 ◽  
Author(s):  
Eric Caulton ◽  
Julie Arnott ◽  
Francesca Primiani
Keyword(s):  
Herbivore Faeces ◽  
Pollen Rain ◽  
Moss Polsters

MODERN POLLEN RAIN STUDIES IN EASTERN ONTARIO

1963 ◽  
Vol 41 (2) ◽  
pp. 243-252 ◽  
Author(s):  
James E. King ◽  
Ronald O. Kapp
Keyword(s):  
United States ◽  
Long Range ◽  
Southwestern United States ◽  
Pollen Trap ◽  
Modern Pollen ◽  
Pollen Rain ◽  
Moss Polsters ◽  
Eastern Ontario

Moss polsters were collected at 15 sites between Toronto and Lake Timagami, Ontario, and at 4 localities in the Lake Timagami area for the purpose of determining the regional pollen rain and its local variations. Pollen percentages of Acer, Quercus, Ambrosia, Chenopodiaceae, Compositae, and Gramineae decrease northward and Picea, Pinus, and Betula increase at the more northerly sites. From the three most northern sites a regional pollen rain was calculated by averaging the percentages from nine pollen spectra. In this area the regional pollen rain is dominated by Picea (15%), Pinus (38%), and Betula (22%). At one site a grain of Ephedra was recovered, apparently carried in by long range drift. The nearest place that it grows naturally is in the southwestern United States. Various pollen trap types were investigated and it was found that all types of moss polsters and some types of decaying stumps (depending on their moisture-holding capacity) were effective in preserving the modern pollen rain.

Modern pollen-vegetation relationships along a steep temperature gradient in the Tropical Andes of Ecuador

2019 ◽  
Vol 92 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Kimberley Hagemans ◽  
Claudia-Dana Tóth ◽  
Manuela Ormaza ◽  
William D. Gosling ◽  
Dunia H. Urrego ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Vascular Plant ◽  
Montane Forest ◽  
Sediment Surface ◽  
Tropical Andes ◽  
Modern Pollen ◽  
Surface Samples ◽  
Steep Temperature Gradient ◽  
Pollen Rain ◽  
Moss Polsters

AbstractThe characterization of modern pollen rain assemblages along environmental gradients is an essential prerequisite for reliable interpretations of fossil pollen records. In this study, we identify pollen-vegetation relationships using modern pollen rain assemblages in moss polsters (n = 13) and lake sediment surface samples (n = 11) along a steep temperature gradient of 7°C (3100–4200 m above sea level) on the western Andean Cordillera, Ecuador. The pollen rain is correlated to vascular plant abundance data recorded in vegetation relevées (n = 13). Results show that pollen spectra from both moss polsters and sediment surface samples reflect changes in species composition along the temperature gradient, despite overrepresentation of upper montane forest taxa in the latter. Estimated pollen transport distance for a lake (Laguna Llaviucu) situated in a steep upper montane forest valley is 1–2 km, while a lake (Laguna Pallcacocha) in the páramo captures pollen input from a distance of up to 10–40 km. Weinmannia spp., Podocarpus spp., and Hedyosmum sp. are indicators of local upper montane forest vegetation, while Phlegmariurus spp. and Plantago spp. are indicators for local páramo vegetation.

Pollen Taphonomy in a Canyon Stream

1987 ◽  
Vol 28 (3) ◽  
pp. 393-406 ◽  
Author(s):  
Patricia L. Fall
Keyword(s):  
Surface Soil ◽  
Pollen Grains ◽  
Close Correlation ◽  
Soil Samples ◽  
Alluvial Deposits ◽  
Modern Pollen ◽  
Pollen Types ◽  
Pollen Rain ◽  
Arid Steppe ◽  
Turbulent Water

AbstractSurface soil samples from the forested Chuska Mountains to the arid steppe of the Chinle Valley, Northeastern Arizona, show close correlation between modern pollen rain and vegetation. In contrast, modern alluvium is dominated by Pinus pollen throughout the canyon; it reflects neither the surrounding floodplain nor plateau vegetation. Pollen in surface soils is deposited by wind; pollen grains in alluvium are deposited by a stream as sedimentary particles. Clay-size particles correlate significantly with Pinus, Quercus, and Populus pollen. These pollen types settle, as clay does, in slack water. Chenopodiaceae-Amaranthus, Artemisia, other Tubuliflorae, and indeterminate pollen types correlate with sand-size particles, and are deposited by more turbulent water. Fluctuating pollen frequencies in alluvial deposits are related to sedimentology and do not reflect the local or regional vegetation where the sediments were deposited. Alluvial pollen is unreliable for reconstruction of paleoenvironments.

scholarly journals Palynology of sheep's faeces: relationship between pollen content, diet and local pollen rain

Grana ◽  
1983 ◽  
Vol 22 (2) ◽  
pp. 105-113 ◽  
Author(s):  
Dagfinn Moe
Keyword(s):  
Pollen Content ◽  
Pollen Rain

scholarly journals POLLEN-RAIN FROM THE VEGETATION OF NORTH-WEST INDIA

1973 ◽  
Vol 72 (1) ◽  
pp. 191-206 ◽  
Author(s):  
G. SINGH ◽  
S. K. CHOPRA ◽  
A. B. SINGH
Keyword(s):  
North West ◽  
Pollen Rain

A 6000-year record of ecological and hydrological changes from Laguna de la Leche, north coastal Cuba

2007 ◽  
Vol 67 (1) ◽  
pp. 69-82 ◽  
Author(s):  
Matthew C. Peros ◽  
Eduard G. Reinhardt ◽  
Anthony M. Davis
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Plant Macrofossils ◽  
Water Levels ◽  
Loss On Ignition ◽  
Coastal Lake ◽  
Freshwater Gastropods ◽  
Level Increase ◽  
Pollen Rain ◽  
Calcareous Microfossils

AbstractLaguna de la Leche, north coastal Cuba, is a shallow (≤ 3 m), oligohaline (∼ 2.0–4.5‰) coastal lake surrounded by mangroves and cattail stands. A 227-cm core was studied using loss-on-ignition, pollen, calcareous microfossils, and plant macrofossils. From ∼6200 to ∼ 4800 cal yr BP, the area was an oligohaline lake. The period from ∼ 4800 to ∼ 4200 cal yr BP saw higher water levels and a freshened system; these changes are indicated by an increase in the regional pollen rain, as well as by the presence of charophyte oogonia and an increase in freshwater gastropods (Hydrobiidae). By ∼ 4000 cal yr BP, an open mesohaline lagoon had formed; an increase in salt-tolerant foraminifers suggests that water level increase was driven by relative sea level rise. The initiation of Laguna de la Leche correlates with a shift to wetter conditions as indicated in pollen records from the southeastern United States (e.g., Lake Tulane). This synchronicity suggests that sea level rise caused middle Holocene environmental change region-wide. Two other cores sampled from mangrove swamps in the vicinity of Laguna de la Leche indicate that a major expansion of mangroves was underway by ∼ 1700 cal yr BP.

scholarly journals Endozoochory by native and exotic herbivores in dry areas: consequences for germination and survival ofProsopisseeds

2008 ◽  
Vol 18 (2) ◽  
pp. 91-100 ◽  
Author(s):  
Claudia M. Campos ◽  
Begoña Peco ◽  
Valeria E. Campos ◽  
Juan E. Malo ◽  
Stella M. Giannoni ◽  
...  
Keyword(s):  
Germination Percentage ◽  
Lepus Europaeus ◽  
Arid Zones ◽  
Large Herbivores ◽  
Lama Guanicoe ◽  
Equus Asinus ◽  
Germination Speed ◽  
Herbivore Faeces ◽  
Prosopis Flexuosa ◽  
Apparently Healthy

AbstractMammalian herbivores can play a role in the endozoochorous dispersal ofProsopisseeds in the arid zones of Argentina, and the introduction of exotic mammals can change relevant parameters of the plant's reproductive ecology. Our specific goals were to quantify the seeds ofProsopis flexuosa,P. chilensisandP. torquatacontained in the faeces of native [mara (Dolichotis patagonum), guanaco (Lama guanicoe)] and exotic [donkey (Equus asinus) and hare (Lepus europaeus)] mammals, and to determine the mortality, germination percentage and germination speed of seeds borne in faeces, compared with those collected from trees. In 2006, seeds were collected directly from trees or removed from mammal faeces. Seeds were counted and classified as apparently healthy or damaged.P. torquataandP. flexuosaseeds were found in the dung of guanaco, hare and mara, whereas onlyP. flexuosaseeds appeared in donkey faeces.P. chilensisseeds were only found in guanaco faeces. There was a notable relative abundance of seeds contained in small herbivore faeces in comparison to the large herbivores. The passage through the digestive tract of animals modified seed germination capacity and speed, with great variability between animal species. Guanacos had greater effects than donkeys on mortality, germination percentage and germination speed. Differences between the effects of both smaller-sized herbivores on seeds were much smaller.

Holocene Variations of Monsoon Rainfall in Rajasthan

1981 ◽  
Vol 16 (2) ◽  
pp. 135-145 ◽  
Author(s):  
R. A. Bryson ◽  
A. M. Swain
Keyword(s):  
Interannual Variability ◽  
Fresh Water ◽  
Monsoon Rainfall ◽  
Early Holocene ◽  
Pollen Rain ◽  
Glacial Time

AbstractTwo reconstructed histories of the monsoon rainfall in Rajasthan show that the monsoon was weak or absent in latest glacial time. With the advent of Holocene climatic patterns, fresh water lakes formed in dune fields and the pollen rain preserved in these reservoirs provides a basis for the reconstruction of the monsoon history. The two reconstructions, separated by only 150 km, have some features in common and some striking differences. Both show maximum monsoon amounts in the early Holocene, with a roughly two-thirds decrease to the present. Both show salinization in sub-Boreal time. Both show long intervals of near complete desiccation in the last four millennia. The shorter term variations, however, are not closely parallel. These shorter term variations may be explained in terms of the behavior of the present day interannual variability.

scholarly journals A pollen rain-vegetation study along a 3600 m mountain-desert transect in the Irano-Turanian region; implications for the reliability of some pollen ratios as moisture indicators

2017 ◽  
Vol 247 ◽  
pp. 133-148 ◽  
Author(s):  
Mehdi Dehghani ◽  
Morteza Djamali ◽  
Emmanuel Gandouin ◽  
Hossein Akhani
Keyword(s):  
Pollen Rain ◽  
Vegetation Study
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