Abstract
Through a 2 x 2 factorial outdoor experiment, the effects of leaf damage and sediment type on the compensatory growth of submerged macrophyte Vallisneria spiralis were examined. The results showed that leaf damage and sediment type had significant effects on the cumulative biomass, biomass allocation, and ramet number of V. spiralis. Compared with undamaged plant, the strongly damaged one had a decrease of cumulative biomass and ramet number and an increase of biomass allocation, but no evident difference was observed between weakly damaged and undamaged plants. The cumulative biomass of undamaged and strongly damaged plants was lower in infertile sediments (bank sediment) than in fertile sediments (lake sediment), but that of weakly damaged plant was almost the same in the two sediments. The biomass allocation and ramet number of V. spiralis were higher in bank sediment than in lake sediment. Leaf damage and sediment type also affected the relative growth rate (RGR) of V. spiralis. Leaf damage resulted in an increase of RGR, but the difference of RGR between weak damage and strong damage was not evident. The RGR of undamaged and strongly damaged plants was significantly higher in lake sediment than in bank sediment, but that of weakly damaged plant was almost the same in the two sediments. The mechanisms of the compensatory growth of V. spiralis were discussed.
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Claims 8
Claim · model-written summary
Strong leaf damage decreased cumulative biomass and ramet number.
- Taxon
- Vallisneria spiralis
Vallisneria spiralist0 - Treatment
- strongly damagede0
- Outcome
- cumulative biomass and ramet numbere0
- Direction
- decreasee0
- Comparator
- undamaged plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with undamaged plant, the strongly damaged one had a decrease of cumulative biomass and ramet number”
t0“Vallisneria spiralis”
Claim · model-written summary
Strong leaf damage increased biomass allocation.
- Taxon
- Vallisneria spiralisVallisneria spiralist0
- Treatment
- strongly damagede0
- Outcome
- biomass allocatione0
- Direction
- increasee0
- Comparator
- undamaged plantt1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the strongly damaged one had a decrease of cumulative biomass and ramet number and an increase of biomass allocation”
t0“Vallisneria spiralis”
t1“Compared with undamaged plant”
Claim · model-written summary
Weak damage showed no evident difference from undamaged plants.
- Taxon
- Vallisneria spiralisVallisneria spiralist0
- Treatment
- weakly damagede0
- Outcome
- no evident differencee0
- Direction
- no evident differencee0
- Comparator
- undamaged plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no evident difference was observed between weakly damaged and undamaged plants”
t0“Vallisneria spiralis”
Claim · model-written summary
Infertile bank sediment lowered biomass for undamaged and strongly damaged plants.
- Taxon
- Vallisneria spiralisVallisneria spiralist0
- Treatment
- infertile sediments (bank sediment)e0
- Outcome
- cumulative biomasse0
- Direction
- lowere0
- Comparator
- fertile sediments (lake sediment)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cumulative biomass of undamaged and strongly damaged plants was lower in infertile sediments (bank sediment) than in fertile sediments (lake sediment)”
t0“Vallisneria spiralis”
Claim · model-written summary
Bank sediment increased biomass allocation and ramet number relative to lake sediment.
- Taxon
- V. spiralisVallisneria spiralise0
- Treatment
- bank sedimente0
- Outcome
- biomass allocation and ramet numbere0
- Direction
- highere0
- Comparator
- lake sedimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass allocation and ramet number of V. spiralis were higher in bank sediment than in lake sediment”
Claim · model-written summary
Leaf damage increased relative growth rate.
- Taxon
- Vallisneria spiralisVallisneria spiralist0
- Treatment
- Leaf damagee0
- Outcome
- RGRe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf damage resulted in an increase of RGR”
t0“Vallisneria spiralis”
Claim · model-written summary
Weak and strong damage had no evident RGR difference.
- Taxon
- Vallisneria spiralisVallisneria spiralist0
- Treatment
- weak damagee0
- Outcome
- RGRe0
- Direction
- not evidente0
- Comparator
- strong damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the difference of RGR between weak damage and strong damage was not evident”
t0“Vallisneria spiralis”
Claim · model-written summary
Lake sediment increased RGR for undamaged and strongly damaged plants.
- Taxon
- Vallisneria spiralisVallisneria spiralist0
- Treatment
- lake sedimente0
- Outcome
- RGRe0
- Direction
- highere0
- Comparator
- bank sedimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The RGR of undamaged and strongly damaged plants was significantly higher in lake sediment than in bank sediment”
t0“Vallisneria spiralis”