Effects of fragment traits, burial orientation and nutrient supply on survival and growth in Populus deltoides × P. simonii

Seedlings of Caragana arborescens Lam., Acer Negundo L., Ulmus americana L., Populus deltoides Bartr. and Fraxinus p. lanceolata Sarg. were planted in 3-row shelterbelts at spacings of 4, 8, and 16 feet at the Forest Nursery Station, Indian Head, Saskatchewan. Data for stand and height are presented after 17 years of growth. Survival of caragana, maple, and ash were not materially influenced by Spacing, but that of elm increased from 91 to 100% and of cottonwood from 0 to 25%, as spacings increased from 4 to 16 feet. Caragana was outstanding with 100% survival at all spacings. Maximum height of caragana and ash (15 and 19 feet, respectively) was obtained at the 8-foot spacings; while that of maple and elm (23 and 26 feet) was obtained at the 16-foot spacing.

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Genotype influences survival and growth of eastern cottonwood (Populus deltoides L.) managed as a bioenergy feedstock on retired agricultural sites of the Lower Mississippi Alluvial Valley

New Forests ◽

10.1007/s11056-016-9558-0 ◽

2016 ◽

Vol 48 (1) ◽

pp. 95-114 ◽

Cited By ~ 3

Author(s):

K. C. Dipesh ◽

Michael A. Blazier ◽

Matthew H. Pelkki ◽

Hal O. Liechty

Keyword(s):

Populus Deltoides ◽

Mississippi Alluvial Valley ◽

Bioenergy Feedstock ◽

Alluvial Valley ◽

Eastern Cottonwood ◽

Lower Mississippi Alluvial Valley ◽

Survival And Growth

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The influence of alternative plant propagation and stand establishment techniques on survival and growth of eastern cottonwood (Populus deltoides Bartr.) clones

New Forests ◽

10.1007/s11056-014-9411-2 ◽

2014 ◽

Vol 45 (4) ◽

pp. 487-506 ◽

Cited By ~ 5

Author(s):

Donald J. Kaczmarek ◽

Randall J. Rousseau ◽

Jeff A. Wright ◽

Brian C. Wachelka

Keyword(s):

Populus Deltoides ◽

Plant Propagation ◽

Stand Establishment ◽

Eastern Cottonwood ◽

Survival And Growth

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Influence of increased nutrient supply on Microcystis aeruginosa at cellular and proteomic levels

Aquatic Microbial Ecology ◽

10.3354/ame01939 ◽

2020 ◽

Vol 85 ◽

pp. 47-58

Author(s):

Y Jiang ◽

Y Liu

Keyword(s):

Microcystis Aeruginosa ◽

Regulatory Protein ◽

Acid Synthesis ◽

Nutrient Supply ◽

Nitrogen Supply ◽

Nitrogen And Phosphorus ◽

Comprehensive Description ◽

Amino Acid Synthesis ◽

High Nutrient ◽

Proteomic Responses

Various studies have observed that increased nutrient supply promotes the growth of bloom-forming cyanobacteria, but only a limited number of studies have investigated the influence of increased nutrient supply on bloom-forming cyanobacteria at the proteomic level. We investigated the cellular and proteomic responses of Microcystis aeruginosa to elevated nitrogen and phosphorus supply. Increased supply of both nutrients significantly promoted the growth of M. aeruginosa and the synthesis of chlorophyll a, protein, and microcystins. The release of microcystins and the synthesis of polysaccharides negatively correlated with the growth of M. aeruginosa under high nutrient levels. Overexpressed proteins related to photosynthesis, and amino acid synthesis, were responsible for the stimulatory effects of increased nutrient supply in M. aeruginosa. Increased nitrogen supply directly promoted cyanobacterial growth by inducing the overexpression of the cell division regulatory protein FtsZ. NtcA, that regulates gene transcription related to both nitrogen assimilation and microcystin synthesis, was overexpressed under the high nitrogen condition, which consequently induced overexpression of 2 microcystin synthetases (McyC and McyF) and promoted microcystin synthesis. Elevated nitrogen supply induced the overexpression of proteins involved in gas vesicle organization (GvpC and GvpW), which may increase the buoyancy of M. aeruginosa. Increased phosphorus level indirectly affected growth and the synthesis of cellular substances in M. aeruginosa through the mediation of differentially expressed proteins related to carbon and phosphorus metabolism. This study provides a comprehensive description of changes in the proteome of M. aeruginosa in response to an increased supply of 2 key nutrients.

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Coral husbandry for ocean futures: leveraging abiotic factors to increase survivorship, growth, and resilience in juvenile Montipora capitata

Marine Ecology Progress Series ◽

10.3354/meps13534 ◽

2021 ◽

Vol 657 ◽

pp. 123-133

Author(s):

JR Hancock ◽

AR Barrows ◽

TC Roome ◽

AS Huffmyer ◽

SB Matsuda ◽

...

Keyword(s):

Abiotic Factors ◽

Larval Rearing ◽

Abiotic Conditions ◽

Montipora Capitata ◽

Reef Restoration ◽

Juvenile Corals ◽

Bleaching Response ◽

The Face ◽

Survival And Growth ◽

Global And Local

Reef restoration via direct outplanting of sexually propagated juvenile corals is a key strategy in preserving coral reef ecosystem function in the face of global and local stressors (e.g. ocean warming). To advance our capacity to scale and maximize the efficiency of restoration initiatives, we examined how abiotic conditions (i.e. larval rearing temperature, substrate condition, light intensity, and flow rate) interact to enhance post-settlement survival and growth of sexually propagated juvenile Montipora capitata. Larvae were reared at 3 temperatures (high: 28.9°C, ambient: 27.2°C, low: 24.5°C) for 72 h during larval development, and were subsequently settled on aragonite plugs conditioned in seawater (1 or 10 wk) and raised in different light and flow regimes. These juvenile corals underwent a natural bleaching event in Kāne‘ohe Bay, O‘ahu, Hawai‘i (USA), in summer 2019, allowing us to opportunistically measure bleaching response in addition to survivorship and growth. This study demonstrates how leveraging light and flow can increase the survivorship and growth of juvenile M. capitata. In contrast, larval preconditioning and substrate conditioning had little overall effect on survivorship, growth, or bleaching response. Importantly, there was no optimal combination of abiotic conditions that maximized survival and growth in addition to bleaching tolerances. This study highlights the ability to tailor sexual reproduction for specific restoration goals by addressing knowledge gaps and incorporating practices that could improve resilience in propagated stocks.

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Mechanisms leading to recruitment inhibition of giant kelp Macrocystis pyrifera by an understory alga

Marine Ecology Progress Series ◽

10.3354/meps13550 ◽

2021 ◽

Vol 657 ◽

pp. 59-71

Author(s):

BA Beckley ◽

MS Edwards

Keyword(s):

Field Experiments ◽

Local Community ◽

Kelp Forest ◽

Macrocystis Pyrifera ◽

Forest Recovery ◽

Kelp Forests ◽

Giant Kelp ◽

Combined Effects ◽

Life Stages ◽

Survival And Growth

The forest-forming giant kelp Macrocystis pyrifera and the communities it supports have been decreasing across their native ranges in many parts of the world. The sudden removal of giant kelp canopies by storms increases space and light for the colonization by understory macroalgae, such as Desmarestia herbacea, which can inhibit M. pyrifera recovery and alter local community composition. Understanding the mechanisms by which algae such as D. herbacea interact with M. pyrifera can provide insight into patterns of kelp forest recovery following these disturbances and can aid in predicting future community structure. This study experimentally tested the independent and combined effects of two likely competitive mechanisms by which D. herbacea might inhibit recovery of M. pyrifera in the Point Loma kelp forest in San Diego, California (USA). Specifically, we conducted field experiments to study the individual and combined effects of shade and scour by D. herbacea on the survival of M. pyrifera microscopic life stages, and the recruitment, survival, and growth of its young sporophytes. Our results show that scour had the strongest negative effect on the survival of M. pyrifera microscopic life stages and recruitment, but shade and scour both adversely affected survival and growth of these sporophytes as they grew larger. Canopy-removing storms are increasing in frequency and intensity, and this change could facilitate the rise of understory species, like D. herbacea, which might alter community succession and recovery of kelp forests.

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