Teaching ideas - Assets - Cambridge University Press
... allow respiration, and other metabolic processes associated with growth, such as hydrolysis of starch to glucose, to occur. The seeds obtain this oxygen from the air contained in the soil. Seeds sown deeply in soil often fail to germinate because they do not have enough oxygen. Seeds are likely to g ...
... allow respiration, and other metabolic processes associated with growth, such as hydrolysis of starch to glucose, to occur. The seeds obtain this oxygen from the air contained in the soil. Seeds sown deeply in soil often fail to germinate because they do not have enough oxygen. Seeds are likely to g ...
St John`s wort, Hypericum perforatum, best practice management
... produced by shoots from the lateral roots in spring and autumn. The origin of a mature crown can be determined by digging up the roots. If the main tap root is vertical the plant originates from a seedling, but if there is a right-angled bend just below the crown it originates from a sucker. Vectors ...
... produced by shoots from the lateral roots in spring and autumn. The origin of a mature crown can be determined by digging up the roots. If the main tap root is vertical the plant originates from a seedling, but if there is a right-angled bend just below the crown it originates from a sucker. Vectors ...
Insect Herbivores and Plant Population Dynamics
... Until recently, conventional wisdom suggested that because the world was green, it was not possible that insect herbivores could be food limited (82, 167) . The dramatic outbreaks of herbivorous insects that sometimes followed the indiscriminate use of broad-spectrum insecticides (51) lent credibili ...
... Until recently, conventional wisdom suggested that because the world was green, it was not possible that insect herbivores could be food limited (82, 167) . The dramatic outbreaks of herbivorous insects that sometimes followed the indiscriminate use of broad-spectrum insecticides (51) lent credibili ...
Ornamental Grass - Sacramento County Master Gardeners
... back lit), color, and texture to borders, screens and perennial gardens while providing food and shelter for beneficial insects and birds. Many varieties are able to grow well here with little water during our long, hot, dry summers and do not mind our wet, cool winters. Also, many grasses are indif ...
... back lit), color, and texture to borders, screens and perennial gardens while providing food and shelter for beneficial insects and birds. Many varieties are able to grow well here with little water during our long, hot, dry summers and do not mind our wet, cool winters. Also, many grasses are indif ...
Concept Note Pollination
... are being put at increasing risk from pressures exerted by both population growth and increasing per capita consumption [Sachs, 2008]. Urbanisation, deforestation, climate change, non-native invasive species, unsustainable agricultural practices and over-fishing, among other factors, are modifying t ...
... are being put at increasing risk from pressures exerted by both population growth and increasing per capita consumption [Sachs, 2008]. Urbanisation, deforestation, climate change, non-native invasive species, unsustainable agricultural practices and over-fishing, among other factors, are modifying t ...
125 KB - Center for Aquatic and Invasive Plants
... Cultural: Weeds such as wisteria generally invade open or disturbed areas following a burn, clearing mowing, etc., so these areas are particularly vulnerable to invasion. Therefore, a healthy ecosystem with good species diversity will help to deter infestation. Mechanical: Mechanical methods are com ...
... Cultural: Weeds such as wisteria generally invade open or disturbed areas following a burn, clearing mowing, etc., so these areas are particularly vulnerable to invasion. Therefore, a healthy ecosystem with good species diversity will help to deter infestation. Mechanical: Mechanical methods are com ...
Revegetation Guidelines for Western Montana
... should only occur when necessary, as determined by the abundance of desired plants and seeds at the site. This publication provides an in-depth, step-by-step guide to the processes and procedures of establishing desired plant species in the portion of Montana west of the Continental Divide. Detailed ...
... should only occur when necessary, as determined by the abundance of desired plants and seeds at the site. This publication provides an in-depth, step-by-step guide to the processes and procedures of establishing desired plant species in the portion of Montana west of the Continental Divide. Detailed ...
THE LEDA TR AITB ASE - Clo-Pla
... on plant traits. The knowledge of plant traits is currently growing fast, but remains scattered over many sources, i.e. in different journals, large monographs, and herbarium records. Also the sources are presented in various different languages and the data are distributed across many European coun ...
... on plant traits. The knowledge of plant traits is currently growing fast, but remains scattered over many sources, i.e. in different journals, large monographs, and herbarium records. Also the sources are presented in various different languages and the data are distributed across many European coun ...
PDF - FloraBase—the Western Australian Flora
... much more robust than the L. odora group, has a male panicle which usually has more branch-bearing nodes with branches often secondarily branched (never seen in the L. odora group), male pedicels 0.3-1 mm long and a consistently paniculate female inflorescence (female inflorescences are never panic ...
... much more robust than the L. odora group, has a male panicle which usually has more branch-bearing nodes with branches often secondarily branched (never seen in the L. odora group), male pedicels 0.3-1 mm long and a consistently paniculate female inflorescence (female inflorescences are never panic ...
Biology and Management of Spotted Knapweed in
... Cultural: Mowing can be an effective method of controlling spotted knapweed. It is important that the plants are cut while they are flowering, but before they have a chance to produce seed. Prescribed fire can kill adult plants, reduce the number of viable seeds in the seedbank and help establish n ...
... Cultural: Mowing can be an effective method of controlling spotted knapweed. It is important that the plants are cut while they are flowering, but before they have a chance to produce seed. Prescribed fire can kill adult plants, reduce the number of viable seeds in the seedbank and help establish n ...
Mile-A-Minute Vine On the Move
... • Seeds germinate in early April. Plants are usually about a foot or two tall by June 1 , ...
... • Seeds germinate in early April. Plants are usually about a foot or two tall by June 1 , ...
seed plants - Biology Junction
... have a fruit around the seed, and thus have “naked seeds”. Most of us think of gymnosperms as just “pines” (or conifers), but there is quite a diversity. Ginkos live on campus - have you seen one? The “fruit” is not really a fruit, but part of the ovule.. pine ...
... have a fruit around the seed, and thus have “naked seeds”. Most of us think of gymnosperms as just “pines” (or conifers), but there is quite a diversity. Ginkos live on campus - have you seen one? The “fruit” is not really a fruit, but part of the ovule.. pine ...
Taylor-et-al-Zamia-s.. - Cycad Specialist Group
... contributing to the uncertainty and ambiguity surrounding these plants. The most critical errors have stemmed from workers spending insufficient time studying plants in habitat and/or examining too few populations or too few plants within individual populations. Notably, the father of the modern stu ...
... contributing to the uncertainty and ambiguity surrounding these plants. The most critical errors have stemmed from workers spending insufficient time studying plants in habitat and/or examining too few populations or too few plants within individual populations. Notably, the father of the modern stu ...
Minnesota Noxious Weeds
... Life History: Vegetative reproduction occurs from below-ground rhizomes, above-ground stolons and suckering of roots. Birds will eat the fruits (arils) during the winter and disperse the seeds. Seeds germinate late spring. Habitat: Readily invades disturbed, open, sunny sites, yet Oriental bitterswe ...
... Life History: Vegetative reproduction occurs from below-ground rhizomes, above-ground stolons and suckering of roots. Birds will eat the fruits (arils) during the winter and disperse the seeds. Seeds germinate late spring. Habitat: Readily invades disturbed, open, sunny sites, yet Oriental bitterswe ...
individual and joint effects on plant fitness
... not have a highly branched root system with many fine roots. Rather, plants form a long central tap root, and occasionally also produce a few large side roots. In grasslands, lupine seedling recruitment is episodic, and seedling abundance can vary by several orders of magnitude between years (Maron ...
... not have a highly branched root system with many fine roots. Rather, plants form a long central tap root, and occasionally also produce a few large side roots. In grasslands, lupine seedling recruitment is episodic, and seedling abundance can vary by several orders of magnitude between years (Maron ...
The Ecology of Mutualism
... neatly on a symbiotic/nonsymbiotic dichotomy. Although exceptions abound, symbiotic mutualisms tend to be coevolved and obligate, while facultative mutualisms are frequently nonsymbiotic and not eoevolved. Usingthese definitions, we start with two observations. On the one hand, an enormous number of ...
... neatly on a symbiotic/nonsymbiotic dichotomy. Although exceptions abound, symbiotic mutualisms tend to be coevolved and obligate, while facultative mutualisms are frequently nonsymbiotic and not eoevolved. Usingthese definitions, we start with two observations. On the one hand, an enormous number of ...
Cone size is related to branching architecture in conifers
... leaves; cone type: 0, dry; 1, fleshy) that indicate the presence or absence of a categorical effect that may shift the slope and intercept of the relationship between cone volume and branch diameter (see Notes S2 for more details). We evaluated each model using ordinary least squares (OLS) as well a ...
... leaves; cone type: 0, dry; 1, fleshy) that indicate the presence or absence of a categorical effect that may shift the slope and intercept of the relationship between cone volume and branch diameter (see Notes S2 for more details). We evaluated each model using ordinary least squares (OLS) as well a ...
Flowers
... -center most circle of flower parts -one or more carpels form the pistil -the ovary is the base of the pistil, the style is the stalk, and the stigma is at the top of the stalk -ovules are located inside the ovary ...
... -center most circle of flower parts -one or more carpels form the pistil -the ovary is the base of the pistil, the style is the stalk, and the stigma is at the top of the stalk -ovules are located inside the ovary ...
Pollination by Hymenopterans and Ec Hymenopterans and
... nectar pollen and other fluid secretions for pollinators as a source of food. Pollinators on the other hand benefit the plant by ensuring the continuity of their life through sexual reproduction with effective pollination. Plants provide the pollinator with the appropriate clues and positive reinfor ...
... nectar pollen and other fluid secretions for pollinators as a source of food. Pollinators on the other hand benefit the plant by ensuring the continuity of their life through sexual reproduction with effective pollination. Plants provide the pollinator with the appropriate clues and positive reinfor ...
e,x SOYBEAN DISEASES - US Department of Agriculture
... run together; the resulting large dead areas may fall out. Diseased leaves may be severely torn by high winds during rainstorms. Heavy infection may cause dropping of lower leaves. Bacterial blight is likely to be most severe during periods of cool weather and frequent rain or dew. It is usually obs ...
... run together; the resulting large dead areas may fall out. Diseased leaves may be severely torn by high winds during rainstorms. Heavy infection may cause dropping of lower leaves. Bacterial blight is likely to be most severe during periods of cool weather and frequent rain or dew. It is usually obs ...
Latitude, seed predation and seed mass
... Aim We set out to test the hypothesis that rates of pre- and post-dispersal seed predation would be higher towards the tropics, across a broad range of species from around the world. We also aimed to quantify the slope and predictive power of the relationship between seed mass and latitude both with ...
... Aim We set out to test the hypothesis that rates of pre- and post-dispersal seed predation would be higher towards the tropics, across a broad range of species from around the world. We also aimed to quantify the slope and predictive power of the relationship between seed mass and latitude both with ...
invasive weed identification and management
... It has been estimated that $500 million per year is spent on invasive weed control in residential turf and $ 1 billion per year in the golf course industry (Pimentel 2000). Common dandelion, for example, was introduced to North America as a salad green in the 1600s, but is now ubiquitous in American ...
... It has been estimated that $500 million per year is spent on invasive weed control in residential turf and $ 1 billion per year in the golf course industry (Pimentel 2000). Common dandelion, for example, was introduced to North America as a salad green in the 1600s, but is now ubiquitous in American ...
Plants for Stormwater Design Manual
... The twigs and seeds provide forage for many mammals like deer, beavers and mice. This ash also provides habitat for many bird species (especially wood ducks, turkeys, bobwhites, red-winged blackbirds, cardinals, purple finches and pine grosbeaks), sap for yellow-bellied sapsuckers, and nesting habit ...
... The twigs and seeds provide forage for many mammals like deer, beavers and mice. This ash also provides habitat for many bird species (especially wood ducks, turkeys, bobwhites, red-winged blackbirds, cardinals, purple finches and pine grosbeaks), sap for yellow-bellied sapsuckers, and nesting habit ...
Ecology of Banksia
The ecology of Banksia refers to all the relationships and interactions among the plant genus Banksia and its environment. Banksia has a number of adaptations that have so far enabled the genus to survive despite dry, nutrient-poor soil, low rates of seed set, high rates of seed predation and low rates of seedling survival. These adaptations include proteoid roots and lignotubers; specialised floral structures that attract nectariferous animals and ensure effective pollen transfer; and the release of seed in response to bushfire.The arrival of Europeans in Australia has brought new ecological challenges. European colonisation of Australia has directly affected Banksia through deforestation, exploitation of flowers and changes to the fire regime. In addition, the accidental introduction and spread of plant pathogens such as Phytophthora cinnamomi (dieback) pose a serious threat to the genus's habitat and biodiversity. Various conservation measures have been put in place to mitigate these threats, but a number of taxa remain endangered.