Nitrogen sources for neotropical nasute termites: Fixation and selective foraging

  title={Nitrogen sources for neotropical nasute termites: Fixation and selective foraging},
  author={Glenn D. Prestwich and Barbara L. Bentley and Edward J. Carpenter},
SummaryStudies with Nasutitermes and Rhynchotermes (Isoptera, Nasutitermitinae) in a Costa Rican rainforest suggest that nitrogen fixation by gut symbionts may play a significant role in termite nutrition. Leaf-litter feeders ingest more and fix less nitrogen than do wood-litter feeders; both species feed preferentially on N-rich foods in their foraging repertoire. Unusually high N2 fixation (acetylene reduction) rates were found in Nasutitermes soldiers, thereby reducing their nutritional… 

Nitrogen fixation by intact colonies of the termite Nasutitermes corniger

Whole colonies of the arboreal termite Nasutitermes corniger from a Costa Rican rainforest were assayed for nitrogen fixation by the acetylene reduction method, finding nitrogen doubling time of 200–600 days makes possible complete replacement of the nest population 1–2 times per year.

Seasonal effects of calcium and phosphates on the feeding preference of the termite Reticulitermes flavipes (Isoptera: Rhinotermitidae).

Testing whether the termite Reticulitermes flavipes preferentially fed on food sources containing calcium and phosphorus in the spring, summer, and fall suggested that phosphorus may be limiting for R. flavipes during the fall and may be a component of wood determining feeding preference.

Limited survival strategy in starving subterranean termite colonies

The hemimetabolous developmental pathway, the difference of timing in the molting cycle of termite instars and the relatively rapid exhaustion of soldiers, indirectly determined the sequence of starvation-induced mortality and subsequent cannibalism.

The effects of dietary nitrogen on symbiotic nitrogen fixation in the eastern subterranean termite, Reticulitermes flavipes

Results indicated that nitrogen fixation rates are plastic within R. flavipes and they are negatively correlated with dietary nitrogen, as hypothesized, and a follow-up study was conducted to investigate three assumptions associated with the initial experiment.

Soil organic matter is essential for colony growth in subterranean termites

It is argued that not all wood-feeding termites rely on symbiotic diazotrophic bacteria for colony growth, as Rhinotermitidae reliance on soil microbial decomposition activity for optimal colony growth may also have had a critical mechanistic role in the initial emergence of Termitidae.

Nitrogen Fixation by Termites in Tropical Forests, Thailand

Although N fixed by termites is a small input compared to other inputs, this N is likely important for decomposition processes and is directly supplied to decomposers breaking down dead plant material.

Parental Nitrogen Transfer and Apparent Absence of N2 Fixation during Colony Foundation in Coptotermes formosanus Shiraki

It is shown that, when in nitrogen-poor rearing conditions, the king and queen initially transferred half of their nitrogen reserves to their first brood, however, the total nitrogen content in colonies did not increase over a 12 month period, despite the presence of functional workers.

The effect of nonnestmates on foraging trail caste ratios ofNasutitermes corniger (Isoptera: Termitidae)

It is demonstrated that the addition of nonnestmates temporarily alters caste ratios on foraging trails, representing a shift in the distribution of castes in response to environmental perturbation.

Feeding preferences of oil palm pest subterranean termite Coptotermes curvignathus (Isoptera: Rhinotermitidae)

It is demonstrated that glucose might be a key additive in development of an effective bait system for subterranean termite management and in choice feeding bioassays, size of bait and nutrient were investigated and found to significantly influence termite feeding preference.



Effects of desiccation and rehydration on nitrogen fixation by epiphylls in a tropical rainforest

Leaf samples which had been rehydrated for 2 and 4 h showed intermediate fixation rates, indicating that epiphyllous bryophytes maintain moist conditions on the leaf surface and thus create a microenvironment suitable for prolonged fixation by the microorganisms.

Nitrogen Fixation in Marine Shipworms

Nitrogen fixation activity appeared to be inversely related to the ability of shipworms to obtain combined-nitrogen compounds in their diet, and could be a significant source of nitrogen for shipwornms and perhaps other oceanic organisms that ingest terrestrial plant material.

Nitrogen Fixation by Epiphylls in a Tropical Rainforest

The epiphyll community is best developed in regions of high rainfall and low evaporation and is most diverse in tropical rainforests, and rates of fixation are quite variable in both time and space.

Nitrogen fixation by bacteria from the hindgut of termites.

Anaerobically grown bacteria isolated from the hindgut contents of the termites Coptotermes lacteus (Froggatt), Mastotermes darwiniensis Froggatt and Nasutitermes exitiosus (Hill) were

Observations on the foraging activity of Hospitalitermes umbrinus (Haviland), (Isoptera: Termitidae) in the Gunong Mulu National Park, Sarawak

Abstract. 1. A single nest of the black surface‐foraging nasute termite Hospitalitermes umbrinus was studied for 5 days in July 1978. Foraging parties of workers and soldiers tend to leave the nest

Nitrogen Fixation in Termites

Nitrogen fixation, measured by the reduction of acetylene to ethylene, was found in workers of the dry-wood termite Kalotermes minor. The soldiers and reproductive castes fixed little or no nitrogen.

Survival and Food Consumption by the Desert Termite Gnathamitermes tubiformans in Relation to Dietary Nitrogen Source and Levels

Workers of the desert termite, Gnathamitermes tubiformans (Buckley), were fed on a natural diet of blue grama leaves and cattle manure, and on artificial diets containing various amounts of

Nitrogen-fixing Enterobacter agglomerans isolated from guts of wood-eating termites

It was concluded that the N2-fixing activity of E. agglomerans may be important to the N economy of C. formosanus and may be related to the marked decrease in N2 fixation rates observed when intact termites or their extracted guts were manipulated for the isolation of bacteria.