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Levin, N.; Kark, S.; Crandall, D. |
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Title |
Where have all the people gone? Enhancing global conservation using night lights and social media |
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Journal Article |
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Year |
2015 |
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Ecological Applications |
Abbreviated Journal |
Ecological Applications |
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Volume |
25 |
Issue |
8 |
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2153–2167 |
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Remote Sensing |
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1051-0761 |
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LoNNe @ christopher.kyba @ |
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1150 |
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Hu, C.; Chen, S.; Wang, M.; Murch, B.; Taylor, J. |
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Title |
Detecting surface oil slicks using VIIRS nighttime imagery under moon glint: a case study in the Gulf of Mexico |
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Journal Article |
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Year |
2015 |
Publication |
Remote Sensing Letters |
Abbreviated Journal |
Remote Sensing Letters |
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Volume |
6 |
Issue |
4 |
Pages |
295-301 |
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Remote Sensing |
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2150-704X |
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LoNNe @ christopher.kyba @ |
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1151 |
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Meyer, L.A.; Sullivan, S.M.P. |
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Title |
Bright lights, big city: influences of ecological light pollution on reciprocal stream-riparian invertebrate fluxes |
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Journal Article |
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Year |
2013 |
Publication |
Ecological Applications |
Abbreviated Journal |
Ecological Applications |
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23 |
Issue |
6 |
Pages |
1322-1330 |
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Keywords |
ecological light pollution; ecosystem function; stream–riparian invertebrate fluxes; tetragnathid spiders; urban streams |
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Cities produce considerable ecological light pollution (ELP), yet the effects of artificial night lighting on biological communities and ecosystem function have not been fully explored. From June 2010 to June 2011, we surveyed aquatic emergent insects, riparian arthropods entering the water, and riparian spiders of the family Tetragnathidae at nine stream reaches representing common ambient ELP levels of Columbus, Ohio, USA, streams (low, 0.1–0.5 lux; moderate, 0.6–2.0 lux; high, 2.1–4.0 lux). In August 2011, we experimentally increased light levels at the low- and moderate-treatment reaches to 10–12 lux to represent urban streams exposed to extremely high levels of ELP. Although season exerted the dominant influence on invertebrate fluxes over the course of the year, when analyzed by season, we found that light strongly influenced multiple invertebrate responses. The experimental light addition resulted in a 44% decrease in tetragnathid spider density (P = 0.035), decreases of 16% in family richness (P = 0.040) and 76% in mean body size (P = 0.022) of aquatic emergent insects, and a 309% increase in mean body size of terrestrial arthropods (P = 0.015). Our results provide evidence that artificial light sources can alter community structure and ecosystem function in streams via changes in reciprocal aquatic–terrestrial fluxes of invertebrates. |
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1051-0761 |
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IDA @ john @ |
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102 |
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Ter Maat, A.; Pieneman, A.W.; Koene, J.M. |
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Title |
The effect of light on induced egg laying in the simultaneous hermaphrodite Lymnaea stagnalis |
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Journal Article |
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Year |
2012 |
Publication |
Journal of Molluscan Studies |
Abbreviated Journal |
Journal of Molluscan Studies |
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78 |
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3 |
Pages |
262-267 |
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Keywords |
molluscs; Lymnaea stagnalis; reproduction |
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Reproduction is influenced by many external factors. For egg laying of pond snails, one important trigger is the transfer from dirty, oxygen-poor water to clean, oxygen-rich water. This response is due to the combined effects of elevated oxygen level, chemical water composition and clean substrate. Whether this clean-water stimulus (CWS) resembles the natural egg-laying process has remained untested. Given that the response relies heavily on a pretreatment that suppresses egg laying, the animal's internal state is clearly important. Egg laying is known to be influenced by day length, hence external factors signifying time of day or season may be involved. We here study the effect of light on the CWS in the freshwater pulmonate Lymnaea stagnalis. Clean water was more effective in inducing oviposition in the light than during darkness, irrespective of the presence of eyes. Thus, light has a profound influence on egg laying, which is most likely mediated by nonocular photoreceptors. We show that more eggs are laid during the day than during the night in wild-caught animals kept outside, which indicates that the effect of light on CWS-induced egg laying is relevant for the induction of egg laying under natural conditions. |
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0260-1230 |
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IDA @ john @ |
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103 |
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Author |
Mercier, A.; Ycaza, R.; Hamel, J. |
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Title |
Long-term study of gamete release in a broadcast-spawning holothurian: predictable lunar and diel periodicities |
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Journal Article |
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Year |
2007 |
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Marine Ecology Progress Series |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
329 |
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179-189 |
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Keywords |
Spawning; Periodicity; Lunar cycle; Reproductive synchrony; Holothurians; Echinoderms; Isostichopus fuscus |
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Annual and monthly patterns of gamete release by the sea cucumber Isostichopus fuscus on the coast of Ecuador were studied to determine the proximal spawning cue and variations in reproductive output throughout the year. Several hundred newly collected individuals were monitored nearly every month for 4 yr. I. fuscus displayed a lunar spawning periodicity: 0.7 to 34.9% of individuals consistently spawned 1 to 4 d after the new moon. Spawning mostly occurred within one evening; however, some gamete release was often recorded over 2 to 4 consecutive evenings. Individuals maintained in captivity for several months retained their spawning periodicity and timing with the lunar cycle. Conversely, newly caught individuals that were shaded from the moonlight did not spawn, thus demonstrating the apparent lack of endogenous rhythms and prevalence of lunar luminance over other cues (i.e. tidal cycle, fluctuations in barometric pressure). On a spawning night, males typically initiated gamete release around sunset; females spawned just after the peak male broadcast. The percentage of spawning individuals was higher and a greater overlap between male and female peak spawning activity was observed during clear conditions compared with overcast conditions. The gonads of individuals that did not spawn in a given month showed a variety of maturity levels, including post-spawning, growth and mature gametogenic stages. Hence, the individual reproductive cycle is apparently longer than the monthly spawning periodicity observed at the population level, enabling I. fuscus populations to be reproductive year round. |
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0171-8630 |
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IDA @ john @ |
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104 |
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