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Most prominent theories of food web dynamics imply the simultaneous action of bottom-up and top-down forces. However, transient bottom-up effects resulting from resource pulses can lead to sequential shifts in the strength of top-down predator effects. We used a large-scale field experiment (32 small islands sampled over 5 years) to probe how the frequency and magnitude of pulsed seaweed inputs drives temporal variation in the top-down effects of lizard predators. Short-term weakening of lizard effects on spiders and plants (the latter via a trophic cascade) were associated with lizard diet shifts, and were more pronounced with larger seaweed inputs. Long-term strengthening of lizard effects was associated with lizard numerical responses and plant fertilisation. Increased pulse frequency reinforced the strengthening of lizard effects on spiders and plants. These results underscore the temporally variable nature of top-down effects and highlight the role of resource pulses in driving this variation.
This article was published in the following journal.
Name: Ecology letters
Erythematotelangiectatic rosacea is a common condition in Caucasians. The most frequently used lasers to treat this condition are pulsed dye laser (PDL) and neodymium:yttrium-aluminum-garnet laser (Nd...
Both natural and human-induced disturbances are commonly responsible for an overall decrease of the world's seaweed. Along Japan's coastal areas, edible seaweed production has been decreasing for deca...
The effects of seaweed compounds have been studied in relation to colorectal cancer (CRC) based on their ability to modulate carcinogen metabolism in vivo and in vitro. However, no epidemiological stu...
The objective of this study was to investigate microbial responses when seaweed fertilizer was added to maize straw compost. The metabolic characteristics and bacterial communities were assessed using...
Long-pulsed (LP) lasers at pulse durations of 1-300 ms have been used to destroy nests of nevi cells by selectively targeting pigment chromophores.
The current study will explore the impact of seaweed extract on cognitive function following a high-carbohydrate meal at a number of time-points post-consumption.
Double blinded, randomized, placebo controlled preliminary pilot exploratory investigation into the effects of brown seaweed extract supplementation, on fasting blood Insulin, fasting bloo...
Brown seaweeds are a rich source of phlorotannins, a characteristic class of polyphenols which are unique to seaweeds of this type and can comprise 5 to 15 % of the dried weight. Unlike ot...
The purpose of the trial is to compare efficacy and adverse effects of pulsed dye laser and intense pulsed light in patients with port wine stains.
This study evaluates targeted subsidies as a strategy to improve sanitation infrastructure and behaviours in communities that have reached Open Defecation Free (ODF) status after a Communi...
Physiological or psychological effects of periods of work which may be fixed or flexible such as flexitime, work shifts, and rotating shifts.
Translocation of body fluids from one compartment to another, such as from the vascular to the interstitial compartments. Fluid shifts are associated with profound changes in vascular permeability and WATER-ELECTROLYTE IMBALANCE. The shift can also be from the lower body to the upper body as in conditions of weightlessness.
A state of internal activity of an organism that is a necessary condition before a given stimulus will elicit a class of responses; e.g., a certain level of hunger (drive) must be present before food will elicit an eating response.
A genus of RED ALGAE in the family Gracilariaceae. It is a highly commercial SEAWEED and a source of AGAR.
A genus of RED ALGAE in the family Bangiaceae. It is the most widely consumed SEAWEED in the world and especially in Asia.
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism ...