Scientific Note: Capsule-Seed Allometric Relationships in Ludwigia ravenii (Onagraceae), a Critically Imperiled Wetland-Obligate

Assessing the impacts of environmental stresses on plant growth and productivity requires an understanding of the growth processes and the carbon economy that underpins this growth. Potted grapevines of the Vitis vinifera L. cv. Semillon were grown in a controlled environment and canopy growth; leaf, bunch and stem extension and net photosynthesis were routinely measured from budbreak to harvest. Allometric relationships enabled dry matter to be determined and, with net photosynthesis, used to determine the shoot carbon economy. Stems, leaves and bunches all followed a sigmoid growth pattern with leaves and stems allocated similar amounts of biomass and carbon while bunches had twice as much. Rates of carbon sequestered as biomass exceeded rates of carbon acquisition through net photosynthesis for over 25 days after budbreak. Despite the high demand for biomass in bunch growth, rates of carbon sequestration actually declined and overall, the vines maintained a positive carbon balance throughout the period of bunch growth. The Semillon shoots relied on carbon reserves to commence growth then produced a 53% carbon surplus after leaf (9%), stem (10%) and bunch (28%) growth demands were satisfied. This suggests these vines also allocated carbon to reserves to sustain the next season’s growth.

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SCIENTIFIC NOTE: A New Host Plant Record for Moneilema variolare Thomson in México (Coleoptera: Cerambycidae: Lamiinae)

The Coleopterists Bulletin ◽

10.1649/732 ◽

2004 ◽

Vol 58 (4) ◽

pp. 578-579 ◽

Cited By ~ 1

Author(s):

Juan Rodrigo Salazar ◽

Carlos Céspedes Acuña ◽

Felipe A. Noguera

Keyword(s):

Host Plant ◽

New Host ◽

Scientific Note

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SCIENTIFIC NOTE

The Coleopterists Bulletin ◽

10.1649/0010-065x(2003)057[0025:oannfp]2.0.co;2 ◽

2003 ◽

Vol 57 (1) ◽

pp. 25-26 ◽

Cited By ~ 2

Author(s):

Fernando Z. Vaz-de-Mello

Keyword(s):

Scientific Note

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Allometric relationships between the length of pregnancy and body parameters in mammals

10.1063/1.4897887 ◽

2014 ◽

Author(s):

A. T. Atanasov ◽

M. Todorova ◽

D. T. Valev ◽

R. Todorova

Keyword(s):

Allometric Relationships ◽

Body Parameters

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SCIENTIFIC NOTE: Observations of Urban Dung Beetles Utilizing Dog Feces (Coleoptera: Scarabaeidae)

The Coleopterists Bulletin ◽

10.1649/748.1 ◽

2005 ◽

Vol 59 (3) ◽

pp. 400-401 ◽

Cited By ~ 10

Author(s):

Ronald D. Cave

Keyword(s):

Dung Beetles ◽

Scientific Note

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Moving cheaply: energetics of walking in the African elephant.

Journal of Experimental Biology ◽

10.1242/jeb.198.3.629 ◽

1995 ◽

Vol 198 (3) ◽

pp. 629-632 ◽

Cited By ~ 5

Author(s):

V A Langman ◽

T J Roberts ◽

J Black ◽

G M Maloiy ◽

N C Heglund ◽

...

Keyword(s):

Fuel Economy ◽

African Elephant ◽

Metabolic Energy ◽

Energetic Cost ◽

Allometric Relationships ◽

Cost Of Locomotion ◽

Biological Laws ◽

Large Animals ◽

The Cost

Large animals have a much better fuel economy than small ones, both when they rest and when they run. At rest, each gram of tissue of the largest land animal, the African elephant, consumes metabolic energy at 1/20 the rate of a mouse; using existing allometric relationships, we calculate that it should be able to carry 1 g of its tissue (or a load) for 1 km at 1/40 the cost for a mouse. These relationships between energetics and size are so consistent that they have been characterized as biological laws. The elephant has massive legs and lumbers along awkwardly, suggesting that it might expend more energy to move about than other animals. We find, however, that its energetic cost of locomotion is predicted remarkably well by the allometric relationships and is the lowest recorded for any living land animal.

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