Another popular free standing play structure is a sand digger. Young excavators love spending hours crafting the perfect sand or dirt creations as they are able to actually move the earth with these unique playground structures. Help kids discover their inner engineer with fun and colorful sand diggers! Atmospheric noise levels e.g., the regular passing of a Boeing 737 passenger jet 300 metres overhead for onemonth during important feeding or breeding periods. Further details

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The weight limit of The Big Dig Sandbox Digger is 110 pounds. This means that our kids will be able to use this toy for years before they get too heavy for the seat. We expect that they will outgrow it based on their height and how comfortable they can be on the seat before reaching the weight limit. Evidence Bathyporeia pelagica is infaunal and highly mobile so that is unlikely to be damaged by abrasion caused by the passing scallop dredge. Therefore, it has been assessed as tolerant. The Higley Sand digger holds up to 400 lbs of weight and turns 360 degrees. This little digger will build arm strength along with hand eye coordination. Connor, D.W., Brazier, D.P., Hill, T.O., & Northen, K.O., 1997b. Marine biotope classification for Britain and Ireland. Vol. 1. Littoral biotopes. Joint Nature Conservation Committee, Peterborough, JNCC Report no. 229, Version 97.06., Joint Nature Conservation Committee, Peterborough, JNCC Report No. 230, Version 97.06. EvidenceNo information concerning non-native species that might affect abundance or survival of Bathyporeia pelagica was found.Read, P.A., Anderson, K.J., Matthews, J.E., Watson, P.G., Halliday, M.C. & Shiells, G.M., 1983. Effects of pollution on the benthos of the Firth of Forth. Marine Pollution Bulletin, 14, 12-16. EvidenceWithin amphipod crustaceans the most efficient adaptations of body form for a sand burrowing mode of life have occurred (Maurer et al., 1986). Bathyporeia pelagica would probably be unaffected by an additional covering of a sediment of a texture within its habitat preference (fine - medium sand, 0.125-0.5 mm median diameter, Wentworth scale), although there may be an energetic cost incurred by the additional burrowing activity required to attain a near-surface position for feeding and to swim. However, Maurer et al., (1986) observed curtailment of burrowing activity and reduced survivorship in another burrowing amphipod, Parahaustorius longimerus (Haustoriidae), when exposed to 'exotic' sediments with a greater silt/clay content. Therefore, Bathyporeia pelagica is likely to be more intolerant of smothering by both coarser and finer particles and viscous materials such as oil, through which burrowing is likely to be hindered. Consequently, the intolerance of Bathyporeia pelagica to smothering has been assessed to be intermediate. The species is likely to have a high capacity for recovery (see additional information, below). OBIS (Ocean BiodiversityInformation System), 2023. Global map of species distribution using gridded data. Available from: Ocean Biogeographic Information System. www.iobis.org. Accessed: 2023-11-01 EvidenceSalinities higher than those of natural seawater are uncommon, although they could occur in surface pools of interstitial water on sand and mud flats in summer owing to surface evaporation. Bathyporeia pelagica is a stenohaline species and would be intolerant of exposure to hypersaline conditions, especially in conditions of elevated temperature. However, owing to the relatively well drained nature of the substratum populated by Bathyporeia pelagica, pooling of surface water is unlikely. In addition the species can, to some extent, avoid the factor by burrowing deeper into the sediment where changes of salinity are buffered. Therefore, intolerance has been assessed to be low. Recovery has been assessed to be high because it is unlikely that the entire population would be affected, e.g. individuals may burrow deeper into the sediment, and would rapidly attain a pre-impact population following reproduction.

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Fincham, A.A., 1970b. Rhythmic behaviour of the intertidal amphipod Bathyporeia pelagica. Journal of the Marine Biological Association of the United Kingdom, 50, 1057-1068. A short-term, acute change; e.g., two categories of the water clarity scale (see glossary) for one month, such as from medium to extreme turbidity. Editor's Note (September 2023): This product review was originally written and published in 2020. To make sure we are still recommending the best products for your needs, we recently reviewed this story to make sure it is still accurate and that we stand by what we wrote. Despite newer models and options being available, we still feel confident that this product is one of the best choices, and therefore have included it in The Best Toys for 3-Year-Olds, The Best Toy Cars, and The Best Snow Toys .Reeves International The Big Dig and Roll Ride-On Working Excavator with Wheels: If you want your child to be able to move their sand digger around, consider one with wheels like the Reeves International The Big Dig and Roll Ride-On Working Excavator with Wheels. It is a little bit more expensive, but if you want to use the digger in a yard, the wheels would really up the realistic factor and provide a lot more opportunities for your child to dig. Unless you have very compact sand that is easy to wheel around on, the wheels are probably not worth the extra cost to use at the beach. EvidenceHayward (1994) states that seawater temperatures vary little between day and night, and seasonal variations tend to be slow and gradual, allowing animals to respond through behavioural changes. However, at low tide air temperature becomes critically important to intertidal animals, and on sandy beaches the habitat, from the surface to a depth of several centimetres, can experience large variations in temperature during a single tidal cycle (Hayward, 1994). For instance, Khayrallah & Jones (1978b) reported the temperature range of sand at a depth of 1 cm during neap tide periods, to be from -2°C in February 1973 to a maximum of 25°C in July 1977, but freezing of sediment was only encountered once in the three year period of study. The effect of an unusually cold winter on the interstitial fauna is a simple physical one, in which body fluids freeze, causing cell and tissue damage. However, whilst low temperature are likely to be physically damaging to interstitial animals, Crisp (1964) reported that other interstitial species of amphipod and isopods seemed to be unharmed by the severe winter of 1962-1963 and intolerance has been assessed to be low.

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Khayrallah, N.H., 1977. Studies on the ecology of Bathyporeia pilosa in the Tay Estuary. , PhD thesis, University of Dundee. Evidence Bathyporeia pelagica may respond, e.g. wriggle, to vibrations caused by noise, but it is unlikely to be directly sensitive to noise at the benchmark level. We used a garden hose for more extensive cleaning to make sure that all of the dirt and wet sand was off. Most of the cleaning was focused on the base and the scoop itself. Because this was a metal toy, we made sure to dry it off before storing it to prevent rust. This is an outside toy, however, so some residual dirt and dust should be expected. We stored The Big Dig Sandbox Digger in our garage to not have to worry about hosing it off thoroughly every time. Benchmark. All of the population of a species or an area of a biotope is smothered by sediment to a depth of 5 cm above the substratum for one month. Impermeable materials, such as concrete, oil, or tar, are likely to have a greater effect. Further details.

Fish, J.D. & Preece, G.S., 1970. The annual reproductive patterns of Bathyporeia pilosa and Bathyporeia pelagica (Crustacea: Amphipoda). Journal of the Marine Biological Association of the United Kingdom, 50, 475-488. Hayward, P.J. 1994. Animals of sandy shores. Slough, England: The Richmond Publishing Co. Ltd. [Naturalists' Handbook 21.] Benchmark. The continuous presence for one month of moving objects not naturally found in the marine environment (e.g., boats, machinery, and humans) within the visual envelope of the species or community under consideration. Further details