1. Duckweed as a problem in nutrient-enriched water Duckweed is a free-floating plant whose populations can attain nuisance levels in slow moving freshwater rivers and ponds, particularly when the water has added nutrients from human farming and industrial activities (Lynch, 2004). Nutrients, mainly nitrogen (N), potassium (K), and phosphorus (P), are applied in
Introduction Our aim of this experiment is to determine how eutrophication affects the growth of duckweed by adding different concentrations of fertilizers to the water with different types and forms of fertilizer keeping it in set conditions for a period of two months to observe how eutrophication affects the growth of duckweed. Thus our hypothesis for this aim is that it is expected that eutrophication would affect the growth of duckweed when different concentrations of fertilizers are added to the water. The reason for studying this aim is that we wish to see how eutrophication affects plant growth in the water even if fertilizers are added to the water. Literature Review The research question that we hope to answer is how eutrophication
However, the rate of the removal was shown to be incredibly slow (with tray B featuring the highest removal rate at a mere 1.11mg/l per day) and, in agreement with the literature (Vanitha, Nampoothiri, Menon & Sivapragasam 2013), would suggest that duckweed would not make a fitting alternative to current means of reducing nitrate pollution in terms of practicality and efficiency, though this may be negated by massive amounts of duckweed in large scale applications such as that used in the experiments carried out in the literature (Yang 2013, Skillicorn
How the data will be analyzed? • The data will be analyzed by the use of a line graph. • And the data will also be analyzed with the use of a table. Hypothesis It is expected that the different fertilisers will have an effect on the growth of the duckweed Aim It is determined that the fertilisers will ensure a rapid growth on the duckweed to aid pond owners in avoiding to use said fertilisers so that their ponds will be rid of duckweed to ensure the life in the water will remain there. Rationale We deem the findings of our research as important because it will help pond owners maintaining their
Effect of salt stress on growth, chlorophyll content, lipid peroxidation and antioxidant defence systems in Phaseolus vulgaris L. Khaled Taïbi a,c,d,⁎, Fadhila Taïbi a, Leila Ait Abderrahim a, Amel Ennajah b, Moulay Belkhodja c, José Miguel Mulet. South African Journal of Botany 105 (2016) 306–312 Fig 1. Interaction effect of different Co concentration and NaCl on chlorophyll a Fig 2. Interaction effect of different Co concentration and NaCl on chlorophyll b Fig 3. Interaction effect of different Co concentration and NaCl on carotenoids Fig 4.
The Effect of Climate Change on the Golden Toad Introduction Throughout history the Earth’s climate continually cooled and warmed with weather regimes changing. This natural process is being enhanced through human activities that are increasing the warming of the atmosphere at a more rapid rate than previously seen. Among the many threats to biodiversity; the destruction of habitats, population growth, pollution, invasive species and overexploitation, climate change is having an adverse effect on biodiversity. The connection between biodiversity and climate change has been established for quite some time now. Ecosystems are already showing negative impacts under current levels of climate change.
Some features affect negatively on the decomposition rate such as; lignin, tannins, nitrogen ratio and hardness of the leaf surface. This paper reports an experiment of leaf decomposition rates for two species; Conocarpus erectus and Albizia lebbeck. It tests the hypothesis that decomposition rate of leaf litter affected by the leaf characteristics and other biological factors such as invertebrates, fungi and
If salinity as occurred in that area, wilted plant and leaf burn would be shown on the plant/s salinity affected. Another factor to consider is finding clovers within crops as if they are affected by salinity the pasture quality and quantity will decrease. When plant seems stressed mixing saline water with channelled water is a factor which might help the plant continue growing and spreading. Figure 5 shows what plants are salt tolerant from 0 – 5.00 dS/m; to which clovers are very weak and salt bushes are one of the strongest. Using salt bushes to feed the cattle will help the salinity problem as salt bush suck out all the salt in the ground and other crops used to feed the cattle may not be needed therefore having more space to grow other crops.
The effect of acid rain on seedling germination By Lily and Zeenat 4th May 2017 Question How does acid rain effect seedling germination(bean seeds) Hypothesis The bean seeds being watered with acid rain will begin to dry up, lose colour, start cracking and stop growing Aim To test whether acid rain will have an effect on seedling germination Introduction When sulfur oxides and nitrogen oxides incorporate into rain, snow or mist, the result is acid precipitation. Acid rain is particularly deadly to green growing things, impacting forest health, farmers' livelihood and the world's precious food supply. Diminished Soil Nutrients As acid rain falls onto soil, it may reduce in acidity because of contact with alkaline or basic substances such as limestone or calcium carbonate. The acid may also be simply immobilized if the sulfate or nitrate ions of the sulfuric and nitric acids are retained in soil or vegetation. The interaction of acid rain with soil is bad for any plants trying to grow there.